Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b311b65d3e7037…

MALICIOUS

PDF

70.9 KB Created: 2021-09-26 12:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0a83f332238e8f928dc345c86381c9a2 SHA-1: 6ccb1ef8cf51dcde598c220763b4ee31987fa9c7 SHA-256: 08b311b65d3e70375cb1f71a30a27e06b0431627641752060ed9771f38fe260c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135eaa728eb5---74584204667.pdf In PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72133992633.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/vajezedupudovibusekaf.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/jojulijixoporerizi.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210915170925.pdfIn PDF document text
    • https://olterus.com/contents/files/dujubivavidimopikiboxoxik.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/66767727707.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/88102353672.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/22689344196.pdfIn PDF document text
    • http://labotinnghia.com/img/files/78206403495.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/36044694437.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/46979858290.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/19701733046.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/pepatoxoj.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/48328381994.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/sijesuletamo.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/20419023926.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/sananedevejilix.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/tanolijujuz.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/mepofepijajuk.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/jevuzawisubumudubanimu.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/daxeleragureve.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/64435802823.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/gowadowodeti.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/99896076632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ola+party+premium+mod+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB241 16476 bytes
SHA-256: 7b5b7f83f2aacc66ce8239b72ab9e3a9bfd1ef8eab3810f17e5dc5041238cbee
font_01_sfnt_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 10612 bytes
SHA-256: 64bf8b86d3ee792450af6aa462d8777dfc9ed7015c546746b27862026a6c50df
font_02_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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