Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5575baef496742a…

MALICIOUS

PDF

76.8 KB Created: 2021-02-03 17:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 78c2a854d0dcdd79fc220359a8592ff3 SHA-1: fc76333df80f15b3cd661adf77d3540d508f58ce SHA-256: e5575baef496742a42a55cb668a82cb8b3d6e830702829f8dd4228f73b1383d6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=reading+comprehension+worksheets+1st+grade+free+printable PDF link annotation
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/nogutebumon.pdfIn PDF document text
    • http://podcard2020.site/9081651978525vdw.pdfIn PDF document text
    • http://kogovokuriboti.22web.org/amiga_forever_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/TDGVgfw/josezatofi.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/aaHhads/26348014710.pdfIn PDF document text
    • http://minuette.me/17200378765g0zjx.pdfIn PDF document text
    • http://nakenanizugaxit.iblogger.org/jenoreneturiro.pdfIn PDF document text
    • http://moresukko.ru/hand_lettering_practice_sheets_freez6q49.pdfIn PDF document text
    • https://xuxijirabof.weebly.com/uploads/1/3/1/4/131406659/zuwotolebibowijevuk.pdfIn PDF document text
    • https://ranazujip.weebly.com/uploads/1/3/5/3/135398887/576b510fe9.pdfIn PDF document text
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/b204560023b.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/jiDyjv0/68873404930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://webidiwotew.epizy.com/bad_boy_audio_song_english.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/miminurojidedijodejoxaw.pdfIn PDF document text
    • http://zerujafulo.rf.gd/xizobawojenim.pdfIn PDF document text
    • http://moraruvotu.epizy.com/naligaxuboxifoni.pdfIn PDF document text
    • http://doveweluzabakiw.rf.gd/achieving_our_country_rorty.pdfIn PDF document text
    • http://laletanegimiw.epizy.com/avena_quaker_tradicional_informacion_nutricional.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_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 5924 bytes
SHA-256: 14f78a86ca90151a08e21bbbc4b54a0e703503f9199bd52dd78bd5b563a2aa1d
font_01_sfnt_off0000ffb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 11008 bytes
SHA-256: 81cf191714299a852e369530fe3fad5e4fc61402bda854fc60270945b1ee6159

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