Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e24e3162b409291…

MALICIOUS

PDF

112.8 KB Created: 2021-07-13 03:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1e7d0904a5e9dcc7f0966dff980f872d SHA-1: 3b2a56a7841dc532b7d04b860c4478f29a1ba548 SHA-256: 9e24e3162b4092916cf98a158b4544604c41ced1ed65156745dc0cd05e0a19b7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://119hero.kr/userData/board/file/gewelapomivik.pdf In PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abf847345e6---zesomuduniwi.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/12896388791563cd06d0ec540846c6aa/golosuwatifofarulimuj.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/18185156211.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/13863404884.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085215ae4f80---rebivokipopijak.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/n7okii6cf0kl6k85v70ertabtt/nawunoxofiweberojur.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1ec086baf---4715332124.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160781a7fe4780---41572226260.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/b06f76e17aa7cd09befdd24400c57bf0/93929511219.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ec98cf4b2d3---bosejodezepulad.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/gikifikuzatapodudotezuwi.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/48728116734.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/84351512429.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8b6f17eb3---426173476.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc67020144---15301633555.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/bfda61fbafc256325f7c014de74d365e/45749165362.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160797cbc07707---wemifipulomekafozexo.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0b9ccad07c074ac23ca826c5548c4602/82923523802.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/fediverojerulaj.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608afc90a3acb---juzomep.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/wenibebalilebaxexanas.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/xufagozafeto.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/77776899988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hsk+6+standard+course+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13594 10664 bytes
SHA-256: 8acaefcd009ab01d704852981bb2a80da169a07f84c4c202e20cde860bdc76a2
font_01_sfnt_off00014e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E37 2288 bytes
SHA-256: 990f9e696ee47860767a0dc208c32b3252e418a41e6cc31fbfef7818d1365ada
font_02_sfnt_off00015864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15864 18120 bytes
SHA-256: 32b5b815578a28fd9b0b776f2a7efcf346fa1f7af07b8ce678952b6c233ee26a
font_03_sfnt_off00018854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18854 16088 bytes
SHA-256: 9097553d388de6ba0c4695ab3f5748207509627cf951ebf2c052ca71e31497d2
font_04_sfnt_off00019d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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