Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e1ce4cf48a20d0…

MALICIOUS

PDF

75.2 KB Created: 2021-03-24 19:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a919e502066dad1a4f220274447403ab SHA-1: 59f199fef8d145fac5293db9ec7fe92d470523fa SHA-256: 38e1ce4cf48a20d0cfe7331f18cf1c2a24818069dbb8274590aa958f05c55667
126 Risk Score

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 0.9997

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://lozipotod.ru/strik?utm_term=mixing+and+mastering+free+download PDF link annotation
    • http://parazepurafeza.medianewsonline.com/how_to_become_a_registered_vet_tech_in_california.pdfIn PDF document text
    • https://lufeziwupidel.weebly.com/uploads/1/3/5/3/135345985/34db3e7e558a1b7.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/6qpTicp/xirokasasujetigisege.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/4726767.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/f2c38f.pdfIn PDF document text
    • http://filanion.online/why_wont_my_water_softener_stop_draining5tcbc.pdfIn PDF document text
    • https://bawokotofebadu.weebly.com/uploads/1/3/4/5/134507933/damanewagoj-vivojuvim-xameweko-gufesora.pdfIn PDF document text
    • http://study-english-04.space/33764385704efjy0.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/gyX4Xii/labewusuxo.pdfIn PDF document text
    • http://pressit.space/268068510298cy2z.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/17020417886.pdfIn PDF document text
    • http://milanomoda-italy.site/mazda_6_2018_reviewvo57o.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/Xiehjhg/battalion_wars_pc.pdfIn PDF document text
    • https://marulokovew.weebly.com/uploads/1/3/4/6/134611896/zufezekavorol_tezedixubinig.pdfIn PDF document text
    • http://watertea.space/mercedes_w124_300d_manual_gearboxwub5k.pdfIn PDF document text
    • http://shoppermarket.online/409088742mvlnz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wirirarosutuki.epizy.com/27537600003.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/zodebipetuxoki.pdfIn PDF document text
    • http://pofaserowezisu.epizy.com/78820034435.pdfIn PDF document text
    • http://lojelepidilik.epizy.com/bujow.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_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 5392 bytes
SHA-256: 7286168bfed78ef1ec963d3d362aca0aa1e207c43dbfd786c630e04f2b0092f8
font_01_sfnt_off0000fa68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 10872 bytes
SHA-256: 30e33f60c9606b0240204b4e7e2f73b66b92d8f1c9c63f380f6918e4acfc4aa6

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