Malicious PDF — malware analysis report

Static analysis result for SHA-256 502c61bbf3de4581…

MALICIOUS

PDF

74.6 KB Created: 2020-11-19 05:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6aa2f38f661e31cd8e2c64922dd76af9 SHA-1: 98562cfee39b940447a7811b312a2fada98a261d SHA-256: 502c61bbf3de4581816d838bea991477e9a85c3f1402c3db24f085ab8330a417
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://traffset.ru/strik?utm_term=sunrider+mask+of+arcadius+strategy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f97b5c9a44ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_5f997e430a559.pdfIn PDF document text
    • https://menuvudojowakap.weebly.com/uploads/1/3/4/5/134594867/naraku.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/banijugoniragom/rulifegovegegolim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96623195-3abf-4ab1-9c43-1e39cf8b8548/rafizimi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/84863002582.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/95972139930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3742ce49-97de-4611-b907-3c53ade06d1b/46835826950.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/disney_aladdin_2019_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/sum_difference_of_cubes_trinomial_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/akrep_sokmasna_yaklam.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/exposition_of_the_most_dangerous_game_story.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/zapifuxemapogen.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/dibrugarh_university_bsc_mathematics_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/14789338220.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/hypertension_drugs.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 6

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_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 5580 bytes
SHA-256: 5f9da34d8e954b46c1829855225489ffd62d12c7762a5e018f77a14e80e81b88
font_01_sfnt_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 10660 bytes
SHA-256: 6e004bf126e9814a98996f71359aa35e1bdd0327a409333c9ccd3d7d51949db0

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