Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8ab44520803bd4…

MALICIOUS

PDF

77.2 KB Created: 2021-02-28 19:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11883d014c7d30114996124073282ff6 SHA-1: 5655f77d4a4e6d3ac17cafe591f2e72e177f83c9 SHA-256: 7a8ab44520803bd478cbfeb882fe40da07a7ddf130b31b1c89749b1cc1659d39
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=plantronics+headset+c054+user+manual PDF link annotation
    • https://manabaxijex.weebly.com/uploads/1/3/4/6/134626004/48d4e856e79d896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5ff8448e4e9a4.pdfIn PDF document text
    • http://istlan.fun/59690614501iw0du.pdfIn PDF document text
    • http://profapp.pro/ruger_sr22_4.5_reviewu8nla.pdfIn PDF document text
    • http://parralax.net/marley_and_me_full_movie_online_free_no_downloadaodqh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379498/normal_5fc90b0f849e9.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/higdTQT/mizix.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/85ihidZ/battleground_survival_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/FBijXHv/digital_marketing_strategy_courses_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_5fdbec63bec93.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/iehglqs/disneyland_paris_deals_christmas_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_6024ac3a89662.pdfIn PDF document text
    • https://cdn.sqhk.co/sonometa/hedhj8g/riverside_drive_apartments_columbus_ohio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://maguvotu.rf.gd/74467204155.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/write_a_short_paragraph_about_your_pet_animal.pdfIn PDF document text
    • http://gagipuriligeme.rf.gd/png_work_permit_renewal_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/13794215831.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/macquarie_capital_group_limited_annual_report.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

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_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 5416 bytes
SHA-256: d52c9faca75932c5e93bcefabec9505e08554f55e19e01231f89e55ae3b7980e
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 10632 bytes
SHA-256: 9a7f2055e36e96281e59cd98f2988b78e768025eb7c35ba1cc95172300cca27f
font_02_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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