Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf50126a390c659…

MALICIOUS

PDF

60.5 KB Created: 2020-11-13 05:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa53916b5f15fc575303229f388f72f0 SHA-1: d35118bb765cf1fa8847bb1038da200846a81694 SHA-256: 1cf50126a390c6590892325b3a79044d84aebaa4b200e0c87380352f66549020
156 Risk Score

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 0.9996

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://trafffe.ru/123?utm_term=clinique+long+last+lipstick+beauty PDF link annotation
    • https://norigawe.weebly.com/uploads/1/3/3/9/133988483/2200549.pdfIn PDF document text
    • https://noverike.weebly.com/uploads/1/3/4/3/134349253/75f5e7822d0c.pdfIn PDF document text
    • https://xezefamije.weebly.com/uploads/1/3/4/3/134352880/sudipaliwuke_vasenezesebuj_nogaga_wisukoxozif.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/9cc2ecff05.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/jikawumog.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/vofosuvuwapiwo/3837948323.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/zixezi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/rinuwenufepogu.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/66032745404.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/threshold_guardian_archetype_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/law_of_acceleration_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/nc_dmv_drivers_license_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/13812706347.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/advanced_mathematical_concepts_precalculus.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/49160130993.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/earn_to_die_2012_unblocked_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/alternative_minimum_taxable_income_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/38640676237.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_off0000afc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC5 5340 bytes
SHA-256: ca667663f5853b695011767ea808ea16c326aa8044e04197428e995ddd4fb28c
font_01_sfnt_off0000c209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC209 10572 bytes
SHA-256: 283de51b671ba8c206260a1f5a41334cc6606b5e43bcc3be71c34ea6203cd29c

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