Malicious PDF — malware analysis report

Static analysis result for SHA-256 5467d638f65c1398…

MALICIOUS

PDF

80.6 KB Created: 2021-04-27 16:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 579fb832f034a1496591c629df8c2d34 SHA-1: df299adce983ec491af97446daf9245a7324d928 SHA-256: 5467d638f65c1398540dd638f0ad950512297f4c9463725373c928be5f9ff1cb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a movie trailer, suggesting a lure to redirect users to malicious sites like https://jottigo.ru/strik?utm_term=youtube+war+horse+theatre+trailer.

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 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://jottigo.ru/strik?utm_term=youtube+war+horse+theatre+trailer PDF link annotation
    • http://websecurer.tech/ffxi_pup_guide31qyj.pdfIn PDF document text
    • http://domavera.ru/7238808677563r2c.pdfIn PDF document text
    • http://reduslim-officialsite.site/32789316239koaqz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_603bb7969b997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6041114099bfe.pdfIn PDF document text
    • http://price-list.moscow/65981605554zs6o2.pdfIn PDF document text
    • http://politach.com/jufapisajovozuroxasowomednncl.pdfIn PDF document text
    • http://babuzarovesi.iblogger.org/jexen.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/public_relations_job_description.pdfIn PDF document text
    • http://jisetatiloro.scienceontheweb.net/46297773981.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://penanaras.myartsonline.com/arthritis_research_uk_elbow_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192b6b62-916c-4c9e-bd76-ca1e3ca62df8/lekajokimotevuzodubo.pdfIn PDF document text
    • http://pubupetedibu.rf.gd/vector_addition_parallelogram_method_worksheet.pdfIn PDF document text
    • http://kapowuxivi.atwebpages.com/list_of_countable_and_uncountable_nouns_food.pdfIn PDF document text
    • http://vomematomeze.epizy.com/hotels_with_jacuzzi_in_room_near_washington_dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712ad963-1090-4f65-bc64-381071cdfeff/how_to_do_rational_exponent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87df8b96-c2ca-4fec-89dd-8955fa799793/7527375116.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/57973390061.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 4964 bytes
SHA-256: 39b2acac4daf2fbe5f14a2d5413ed3080bc54f6e89f1bfd5a63923ea58a90d71
font_01_sfnt_off00010ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED7 11400 bytes
SHA-256: 4ab899f253741f26cce1ae623804935aa1042bf83952becdcb8c4f7cc9ae1dc1

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