Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f8393ca759a867…

MALICIOUS

PDF

68.9 KB Created: 2021-09-17 15:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c418544fd0645c97283eac249ea73033 SHA-1: 10da42ea1199b0b1fa1e9e877e2a1d4683078108 SHA-256: 10f8393ca759a86773baee8b3d64be367a224ef4bd853bf4d391b30f907868b0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to potentially compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. Heuristics like 'PDF_IMAGE_LURE' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a malicious intent to trick users into clicking these links. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=volume+key+camera+shutter+android PDF link annotation
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/zijawojivojazupoxopinabu.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/94013790354.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/jopudejawifoloramasiriv.pdfIn PDF document text
    • https://miet.hu/kepek/37272193732.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/bozudakejisilitoxexadamow.pdfIn PDF document text
    • http://musorcentrum.around.hu/files/article/file/jomenige.pdfIn PDF document text
    • https://ctyhoanongangiang.com/userfiles/file/dagorofosebuxi.pdfIn PDF document text
    • http://ty-int.com/files/files/gikawonakokumulozapade.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/kujudepo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2c1f0b642---72110871086.pdfIn PDF document text
    • http://chinazzjx.com/d/files/6999127231.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/73367326205.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/33471351268.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/durewaruzu.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/1131129220.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/b236u9enlvluped138r0f32l90/73376066984.pdfIn PDF document text
    • https://electroagro.es/pub/files/99205412922.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/28031491712.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/42752916031.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/79443144873.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/bagowuwabiladavesuxewol.pdfIn PDF document text
    • http://orthodoxnews.us/file/671840184.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/raradolatosoge.pdfIn PDF document text
    • http://orthopaede4you.de/userfiles/file/61128704124.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13564739085.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614081691f4a5---jomedajetesatagerog.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AB 14296 bytes
SHA-256: ea57898e5617e2c7dda6de2e797d906ac9dba033c5bc82500e83107163401e98
font_01_sfnt_off0000d4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A0 10908 bytes
SHA-256: 94d6ab8eae8ad278f9fcf1cb50d71183d9eafb63b0790705ca9d98d48f3f2038
font_02_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.