Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e20e99760eaac1…

MALICIOUS

PDF

76.6 KB Created: 2021-03-15 06:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a06fcf2df94e047d8961279fd26ef679 SHA-1: 8ea1f56197297dc66577378508c446fb71cf4834 SHA-256: 93e20e99760eaac1bacea10e661a67491acb5c0c28b5a26c5ad35d4a501802ef
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the document body's reference to 'germanische sprachen pdf' indicate an attempt to drive traffic to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://jacksth.ru/award?keyword=germanische+sprachen+pdf PDF link annotation
    • https://xapodopuk.weebly.com/uploads/1/3/1/8/131856257/jejuviv.pdfIn PDF document text
    • https://zemizipip.weebly.com/uploads/1/3/4/0/134098502/ninevolamovet_febataruve_zojolu_bopewejosup.pdfIn PDF document text
    • https://jetezoxow.weebly.com/uploads/1/3/1/3/131379231/lovujiziwifa_rozadewuwavuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/ghjcjdw/private_wifi_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/mewedenemez/shiHWK8/39096939842.pdfIn PDF document text
    • https://cdn.sqhk.co/ninoporaleva/gjfgfWj/pdf_reader_viewer_apk_download.pdfIn PDF document text
    • https://nometiru.weebly.com/uploads/1/3/4/3/134379396/d05a9cc56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_6016e28b63945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_600dd2e6eaf7b.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/4976071.pdfIn PDF document text
    • https://cdn.sqhk.co/jakovenuz/Mibjhjb/love_tester_3.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/wgihbqj/briefings_in_bioinformatics_letpub.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/ejejfhh/makeup_slime_fluffy_rainbow_slime_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/hhhhjdZ/create_your_own_star_galaxy_heroes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_60334acc40192.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/gfjfMko/88268549522.pdfIn PDF document text
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/forovenug_xodax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407804/normal_5fc919acdf573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5fff3b593448d.pdfIn PDF document text
    • https://cdn.sqhk.co/ninujamezol/go3qhbB/missiles_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/xifinelire/CHQhaYV/17405020357.pdfIn PDF document text
    • https://cdn.sqhk.co/saturarad/jicThcw/zeperekisofijokowokod.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/HyjzSid/kpop_charts_music_bank.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 5392 bytes
SHA-256: f3518e07ba55f73e4945e492550d32623c526b81cd0ca19f2684dad6177cd561
font_01_sfnt_off0000fd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 12048 bytes
SHA-256: 325c136f88e52bcd82e2f9fe9bc4dcc7836a164876e181788b8f5f88ad1b3330