Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a61c3384d63fd9…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 18:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 950a96d63d66e57dbd2f7dfd65715d11 SHA-1: 12953b585508a5b90514ea507a2728777dcee62a SHA-256: 81a61c3384d63fd99b98f6659c3a98779aff62d4023108175c1ea3d61db94bfc
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=unfair+competition+law+pdf PDF link annotation
    • http://worelimupuvefam.mywebcommunity.org/fluke_177_price_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_6000205896df6.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/jihjghf/kgf_movie_background_music_ringtone_download.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/genetics_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_5fdf5095916ca.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/JqgfjiP/mega_man_mobile_download_apk.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/los_angeles_zoning_map.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/alcatel_one_touch_retro_battery_life.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/dupoxabonorepefag.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/2hbXgf8/fall_guys_game_xbox_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/jagePha/11138951076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_60245404f388e.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/hjDgfdV/17931109950.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_4482085b83fd400c82323edd39d8e390.pdf?index=trueIn PDF document text
    • http://gozidonozali.myartsonline.com/39424346274.pdfIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_8601622e32494dde85cc46a2e138a764.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_0fcf5ceb8e284d9ab7f706fc8825b82d.pdf?index=trueIn PDF document text
    • http://rolubumemetujin.atwebpages.com/jepufexemobuzirivadikavop.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_7b6f85648d1e4089892e845fce9cbf1a.pdf?index=trueIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/64347637264.pdfIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_b2f2fb8190004a71bcf9fe0249ef0e63.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_0d4ea4b6f6fc47a58f66a4d0b1b73f3e.pdf?index=trueIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF317 5204 bytes
SHA-256: d04cca474efb55c485b49563b448106fb67d4dd9900389fa0e69790a6dfaf618
font_01_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 10192 bytes
SHA-256: cbbfc39bb13420771e891ca467f1af131e75533c534a6209112b4d6c79eb7b0e

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