Malicious PDF — malware analysis report

Static analysis result for SHA-256 b467d62d75fd7e69…

MALICIOUS

PDF

88.1 KB Created: 2021-03-18 17:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fddc9afc99d2f7318da765d7b4897b2f SHA-1: b0049e41c1ecccd4bfce723a95c83b8664023e10 SHA-256: b467d62d75fd7e69b0c13777898131513c4dc3cfe8c26003d93deb61a808eab4
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=audioquest+dragonfly+red+with+android+phone In PDF document text
    • https://cdn.sqhk.co/jafetegupam/ciccgiN/stick_super_fight_hack_mod_apk.pdfIn PDF document text
    • http://wewidarusen.iblogger.org/american_english_vs_british_english_vocabulary_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377401/normal_5ff0099f5af38.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/jp4sHen/fijalesisorevunisodudo.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/fjg8cwS/zetara.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/4OhfgjM/55416022595.pdfIn PDF document text
    • https://cdn.sqhk.co/dafiwexoki/ZigGcia/53795979468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_6014db12458be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://numebazo.rf.gd/46064159795.pdfIn PDF document text
    • http://jujiruwer.rf.gd/36718809683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8377fef9-eabc-4880-b9f3-3f707b8a245f/vowedewikiv.pdfIn PDF document text
    • http://zalezir.epizy.com/81698197510.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/79755640567.pdfIn PDF document text
    • http://zotebizitiwiwe.epizy.com/carly_for_bmw_full_version_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df02b7a-5195-47cf-b217-93a9ec4e6a1c/24627179707.pdfIn PDF document text
    • http://welokaj.rf.gd/jidimokugujufelotifif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd1d15a-5dbf-40ed-a07b-ae7438a43862/how_many_carbs_in_a_burger_king_grilled_chicken_sandwich.pdfIn PDF document text
    • http://duzoweserunojoj.epizy.com/20390673117.pdfIn PDF document text
    • http://bogetezapore.rf.gd/99962004833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd341518-c39b-45e1-8365-325323a484e8/acer_s231hl_not_turning_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48232c74-88fa-4724-a924-136e69af3deb/32375754785.pdfIn PDF document text
    • http://zisilorelane.rf.gd/using_kinematic_equations_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 5492 bytes
SHA-256: 18fa339c24ebc9b39ed0a999911a365f4c81acec7b8bbd919d83ccc0bd00a32f
font_01_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 11920 bytes
SHA-256: 1d3d1a2a753ca74cc4d3175c84a3c0d20f178ebfb75bcba3bdae594adca838d9
font_02_sfnt_off000144be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333