Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab1d12577daf8c2…

MALICIOUS

PDF

69.2 KB Created: 2021-06-26 01:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cb1677f24eec27c4d8aa303d891dd65c SHA-1: e3905c2ff69d00fe591dc46b765d4e4ec07673c5 SHA-256: 7ab1d12577daf8c23f1797a25c5c55f8cff853531c6e6c1cc7a541837c04f047
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely serving as a lure for phishing or malware downloads. No scripts were extracted, but the presence of external URIs and the link farm structure strongly suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://krisoc.ru/uplcv?utm_term=ml+to+1+litre PDF link annotation
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/bldeqiil0d6vtc65jj357gc0jb/wulugapoxomojunomikav.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/kepisatulazilow.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/77861339444.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/766360fb6a923c0b599d0fb04450f78d/45996286286.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/im9to6bq2m6p3iclsig93usl5c/84052646391.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210626053309_zlepyu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/33310d44967d12d7dd9d3bbd4f8d1bef/20542146486.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/bosivapewixanebedirunan.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/59613763457.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/cjrjdcvbl6s18pjomf8ifg6u1b/samen.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b69712c93---poxesumefarekanexagozafab.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/52598192073.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0b8297b1a---32980288707.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a49f1ecb9---ruxemon.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/g27ma3bljrr0ir23lsukeo01ir/47348111627.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/28e4614217e5e61ff0751a9889b61eeb/levinonafaxut.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/sabunadudir.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160983c86c84b9---97573339699.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/c69b9a6310b6c8f06027e824bb351e39/bugegazoneso.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160784c021a46a---53459276163.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/57343f5d2fddb473b3376b48a1735c7a/petipaxilitujonasekunexu.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/61384098460.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/v0l0cr2afs63s2hd0rpsmqfa11/67699461467.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/06bq5p6023ue5mbq696mt2doac/26296504720.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/4slkn7aduge4bdnomqgc2c7ovd/vavidurazupuwodoxofov.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB546 14720 bytes
SHA-256: 27d802767e1783d06640f7df54871643aa29d93d53f40d74f7cd6ad1efcb3d1a
font_01_sfnt_off0000da4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 9712 bytes
SHA-256: b1cfbcd06ddca0d2d586ced8f2157e8c546ee9e9b4139d4f1d26ba01b0b9f60d

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