Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fadf9073639d5e5…

MALICIOUS

PDF

83.0 KB Created: 2021-03-23 19:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a4c94f77ddbf083dd74c95651ee05d8 SHA-1: 5c82be556ed36961d9b08254721b3ca5d94f896d SHA-256: 3fadf9073639d5e5b1957b3189a1df9c9530294e7f9024696faa9d0c2c2e11b6
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 0.9994

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://fokemale.ru/strik?utm_term=traxxas+tq+2.4+ghz+manual PDF link annotation
    • http://vipogomer.iblogger.org/uppababy_vista_double_stroller.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/big_star_pop_quilt_pattern.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/divibote_wisobagifinata_gijete.pdfIn PDF document text
    • http://tajevis.22web.org/gulumerowipivazaxo.pdfIn PDF document text
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/rizedafu-sulenatemag-fatulanavidujaf-niwezetof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60305c792d905.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/xifiwatidakelulefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fc6694e6dc8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_6036a24e409ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_6001772e74b3c.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/zifevasizekopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8c9e89-5324-4416-9ece-f24137d8c206/60181791519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ccb9b24-da35-4cca-84ec-deabbc111c42/facebook_recover_account_without_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7631223-2ac7-4c23-8180-955ccc0922da/1st_grade_math_teks_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909e34d2-4ca3-4448-a785-088eaea0a472/nixuzabewi.pdfIn PDF document text
    • http://luvibiw.epizy.com/mahakosh_beams_report.pdfIn PDF document text
    • http://tufitokinetesez.rf.gd/teachers_day_short_speech_in_english.pdfIn PDF document text
    • http://pamagidobiguvi.rf.gd/kegibugidakogodisixurotuz.pdfIn PDF document text
    • http://fivulesesixiji.epizy.com/taxexodexevumosi.pdfIn PDF document text
    • http://zumaborelap.rf.gd/xavapevigozirolot.pdfIn PDF document text
    • http://topowurarasixe.epizy.com/95681417598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56024ae9-41df-4a5b-acab-904d42d3310c/39047806380.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/adele_-_someone_like_you_live_at_royal_albert_hall.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 5544 bytes
SHA-256: f2673a9165e2495b39553fe0716dba72a85aa7c8f298affe6d060f8a2293a9a7
font_01_sfnt_off00011538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11538 12276 bytes
SHA-256: 6fd127dda11d8cf560ac6ed832879f1ce3d2f84d63a104650b341434a3fca4d5

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