Malicious PDF — malware analysis report

Static analysis result for SHA-256 c361d134c1d8445a…

MALICIOUS

PDF

69.3 KB Created: 2021-02-14 23:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ffaa2cafa7bc0d6e395cf42b89b2df3b SHA-1: 0314c050b93b47276397363c9c9614c6be2485bf SHA-256: c361d134c1d8445acee0f617a333bd42dcf06d999c897e33d7c8117f60876ebe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://jacksth.ru/aws?utm_term=john+lewis+childrens+shoes+size+guide PDF link annotation
    • http://xtw2.club/the_complete_interview_answer_guide_free_download0oq33.pdfIn PDF document text
    • http://susurrus.space/nolifevp6bb5.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/hjahani/edge_of_dawn_seasons_of_warfare_japanese.pdfIn PDF document text
    • http://idealicacolumbia.site/zewapuwiligeforinuxugannf21q.pdfIn PDF document text
    • http://jumuzonogajal.iblogger.org/motejiwogajof.pdfIn PDF document text
    • http://rezotu.xyz/9658987153581jya.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/ohdcLje/19235338142.pdfIn PDF document text
    • http://shopyou.online/53385230282o6g3l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5fe8ad0a83f1c.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/93fe992313.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/mukorekarabejizifutu.pdfIn PDF document text
    • https://cdn.sqhk.co/fofesali/uhfrhcE/pancake_art_game_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://megegadimopef.rf.gd/wuxovigi.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/abilene_reporter_news_paper_classifieds.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_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 5120 bytes
SHA-256: 55cca4944bfc2091bed43fd26399f12f8faadd03da1aa3ef561fc264647aa64a
font_01_sfnt_off0000e46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46C 10476 bytes
SHA-256: be36034f65ec7ed595bf2f7a512003d1a0a4b89a2b7424aff8ecd7a3585fd57d

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