Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b82ff38a2fafa83…

MALICIOUS

PDF

118.2 KB Created: 2021-03-23 09:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f94f78404bb638b0392c3194eca6eb84 SHA-1: 9dd9e3434db45d76bedf9918fc5f585e5bd225e6 SHA-256: 5b82ff38a2fafa830d0af0151c3d249e808f2a1600080cc0f3afdecab8fd63ee
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 0.9988

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=how+to+wear+a+toga+the+ancient+roman+way PDF link annotation
    • http://tisigetid.iblogger.org/persuasive_speech_format.pdfIn PDF document text
    • http://fobegoruf.iblogger.org/nelesuxofo.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/dd13Vha/5495122158.pdfIn PDF document text
    • https://sajabewegapin.weebly.com/uploads/1/3/4/5/134592402/dabowupividek_zaboto_putotavodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_603241435cf88.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/ZhBhggh/nbc_ct_news_live_stream.pdfIn PDF document text
    • http://lidujer.22web.org/autocad_civil_3d_tutorial_for_beginners.pdfIn PDF document text
    • http://kufagexuwinu.22web.org/dagix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_6018abb2e607e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365580/normal_6008b2d6d6d20.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/ggqxx8b/kavolegixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_602b79faaa453.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/6e319871322e780.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/5b90fe5626.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/1c6347f5283a53.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/d2ieiid/bts_dynamite_remix_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jgehgUF/pressure_washer_pump_parts_craftsman.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibarixe.epizy.com/54362264812.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/34871915079.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/nozupazanuranoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/digelagomidut.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/bloons_td_battles_mod_apk_club_access.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_2d458eeba51246c88d4ab26f9fc2f5de.pdf?index=trueIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_59d52617d1a9446b967cfacf17838ee9.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000193f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193F4 5160 bytes
SHA-256: a09aa9a31eec3bb5e57ee2da09fa9740a0cb35be43e33215420d1e23ed7c4044
font_01_sfnt_off0001a571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A571 10856 bytes
SHA-256: 4e32b5cfdcbb6005e79a3ce8e89966340e4ae06c89a8552ad7d589f7e2d0c699

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