Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee3fac4d385351b…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 02:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e1d5cdf9d2c0d4eea369971bc7ce2a8 SHA-1: 91bd11603148db76f9fe525851cb840005785159 SHA-256: bee3fac4d385351b6902a32bfd78b6a7f6ea10fa2763326db0843770b00ba841
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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 https://baarspo.ru/wix?keyword=spectrum+webmail+settings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5fd938551c2e4.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/paint.net_open_source_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/hhxhdig/introductory_agroforestry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd1d93221823.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384819/normal_5fc948a26a34c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fe4a8a00502a.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/marriott_friends_and_family_rate_authorization_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5ffd6fd9c84ac.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/18862296861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_602dcbc10a91c.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/e7ijgcf/shooting_showdown_2_oculus_go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_6018a0891e7e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_6043f48f970e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5fe9143b6ca5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413117/normal_5feff860c3b24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464850/normal_5ff4be545045d.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/3qihLPZ/simple_dinosaur_drawing_t_rex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_604ca32e94032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/bicillin_la_package_insert.pdfIn PDF document text
    • http://benepuru.epizy.com/fezizuvedonikuwobov.pdfIn PDF document text
    • http://mesujexu.rf.gd/shimano_r2000_reel_review.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 5588 bytes
SHA-256: 15de9e233155659044410b4eb910cf791f0bdc113725be81ee54586b30d692ae
font_01_sfnt_off0000ffab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 11592 bytes
SHA-256: c669fbbb4ee228ecf9edbbeaaa482b2a19e5f62c5d61809f25bda7fe48ce24a3

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