Malicious PDF — malware analysis report

Static analysis result for SHA-256 051dba9fb8dae9df…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 00:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2a91f3d842f995a543f135d7307e3f4d SHA-1: 22dc77ad57441feab9b4762cde6ba6083a6f5a22 SHA-256: 051dba9fb8dae9df0ab0eda412c4a48fd6a37f8588f04aa33d4e0e76f3d9e27b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous external links, many pointing to domains associated with SEO spam or potentially malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to drive traffic to external sites, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://dugedepap.ru/wix?keyword=eternium+merlok+toads PDF link annotation
    • https://cdn.sqhk.co/sedazozesufu/JjbBcji/tibixaxogixozuruzavez.pdfIn PDF document text
    • https://mumojugaweweran.weebly.com/uploads/1/3/1/0/131070520/kelozanolumul_tifiboriko.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/aAyvr8L/bujomaridemejitana.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/5giTpjj/cartoon_tv_plus_apk_download.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/wudopagofilenelo.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/lutukofunawo.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/ifJjg9H/radio_fm_tuner_online.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/ee489eb14005.pdfIn PDF document text
    • https://povufajesozibu.weebly.com/uploads/1/3/0/7/130739002/wodapazaxomevi_losapiguw_sezixa_vobunegelusawu.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/J5PxDjj/tiktok_mashup_2020_clean_october.pdfIn PDF document text
    • https://zivazumuwekaf.weebly.com/uploads/1/3/2/6/132695746/gekanibetakobowik.pdfIn PDF document text
    • https://zirofapenepag.weebly.com/uploads/1/3/4/8/134855920/641996.pdfIn PDF document text
    • https://tugigoboz.weebly.com/uploads/1/3/4/4/134499705/f1e398ff84323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/what_is_a_strength_based_model_in_social_work.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/zakopujud.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/beautiful_colorado_euphonium_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/desam.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/hangout_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/ririsagokudexugudafe.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/jezagetosuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/free_bandicam_crack_only.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/6775068462.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_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 4992 bytes
SHA-256: 473f46096a2fbd29bc4c46143c768a606af773e2b0c2e8a3f95966d3f1c5914f
font_01_sfnt_off00010c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C77 11008 bytes
SHA-256: 096e850f2850fb48fc8bbb2d8b64306cb8169366efdda5569f8fed27ea60fad5

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