Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff48c9b1ffe8658…

MALICIOUS

PDF

76.3 KB Created: 2021-02-22 18:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 25ce96c97d32a52bf495fc58cc32c263 SHA-1: 5b80aeb47a9adc117bea757164afc88f61d13411 SHA-256: dff48c9b1ffe86588acc318de5e1101ce782e9fdd8e90b22dd36661ade8e3ef5
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://bologen.ru/123?utm_term=icom+746+pro+backlight+problem PDF link annotation
    • http://prizinsta365.online/babul_da_vehra_song_djpunjabmj988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_600d3169f33ac.pdfIn PDF document text
    • http://cethq.xyz/gaguvojadinapavugudemutuw099x2.pdfIn PDF document text
    • http://livecopyrightverification.com/vogogosunejipefednh7w.pdfIn PDF document text
    • http://tersq.space/15307325789xttt8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fee714c7a084.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/iajg5jh/23633922119.pdfIn PDF document text
    • http://balenagawovu.22web.org/99047560303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_6011ac1266a31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_600a6b4f3aad1.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/2Qidha3/12970722156.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/1PXOAlQ/magic_fluids_lite.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/idrhgAe/vadarudurelemekubije.pdfIn PDF document text
    • http://kinoxca.xyz/financial_modeling_simon_benninga_pd2b7ry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minofadejewezup.rf.gd/articles_examples_list_in_english_grammar.pdfIn PDF document text
    • http://tijemimujajig.rf.gd/xosepifizirusunapumekusek.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/phonics_blends_worksheets_free.pdfIn PDF document text
    • http://fuxalobel.rf.gd/steelhead_fishing_report_troy_oregon.pdfIn PDF document text
    • http://guxenubegipus.epizy.com/pramod_premi_2018_bhakti_song_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/google_chrome_old_version_xp.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_off0000ec1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 5632 bytes
SHA-256: 2369911158ad43241e99c215212a078ef6a6ba260650d8c88f35cc8c0045280a
font_01_sfnt_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 10852 bytes
SHA-256: b46e0206011dce5abef8242f541994e0b9a26fc9994eb4632eeff06fa26ab835