Malicious PDF — malware analysis report

Static analysis result for SHA-256 7001215d51412b8e…

MALICIOUS

PDF

72.7 KB Created: 2021-03-24 09:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 399562e2fe523e301cf7fceeb5a8d804 SHA-1: 038d035aadce3119e934862defd3b949db127010 SHA-256: 7001215d51412b8e74f593b3dabfb51d5f64dd6438ccaf8ee2578ba673d069a7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to washer types and application metadata, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=which+is+better+a+top+load+washer+with+or+without+agitator PDF link annotation
    • https://cdn.sqhk.co/siloneza/dPGjdHF/41128104449.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/how_to_calculate_redox_titration.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/jie5hg4/texas_historical_markers.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/edEWjcu/2pac_lyrics_hail_mary.pdfIn PDF document text
    • http://nesobaka7.xyz/history_of_indigenous_islamic_education_in_nigeria4doba.pdfIn PDF document text
    • http://teachost.com/are_motts_assorted_fruit_snacks_gluten_freeye5wh.pdfIn PDF document text
    • http://teksalle.xyz/what_are_the_two_types_of_semiconductorevuq7.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/c._v_form_arabic_and_english.pdfIn PDF document text
    • http://sbrf.link/what_happened_in_1900_to_1910ie3dy.pdfIn PDF document text
    • http://warokibujiz.getenjoyment.net/82199786742.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/molecular_biology_and_evolution_journal_abbreviation.pdfIn PDF document text
    • http://prizinsta.online/413337997631ndl9.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/78623489547.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kilisajafe.rf.gd/vabixorexapotexonepoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9e4788-38f6-41ab-a831-5e33ed72da4f/kubemofebipojetibekarov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adae48c5-54d7-4f7e-8f8c-ef6afb5043eb/46221743963.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_off0000dea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA4 5580 bytes
SHA-256: 9777ee7ca53aeb920aa71a0ffbe7121a225f00462601af03c6505f377fb59cd0
font_01_sfnt_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 10492 bytes
SHA-256: 4302f862902539f216d0e3730a46c08a43a447f49a0f7ec491452a1a1fe53c2c

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