Malicious PDF — malware analysis report

Static analysis result for SHA-256 307c7763d90a304a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-07 22:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7631a3f446f8ff2cc1f4186811d9d560 SHA-1: 9ffc4f87025ca51ae53c79715c43723697b70d10 SHA-256: 307c7763d90a304ad490293961681c5aac35305c09d56c5b57c1a5a30badc53d
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 0.9998

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 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://lozipotod.ru/wix?keyword=infinite+campus+ecsd+google+sites PDF link annotation
    • http://filanion.online/jufaradolgpqz.pdfIn PDF document text
    • http://woxuvuxu.iblogger.org/dell_monitor_2405fpw_manual.pdfIn PDF document text
    • http://igcopyrightverify.com/risumetuximenakujotoziskrwva.pdfIn PDF document text
    • http://pixell.store/partition_piano_gratuite_bohemian_rhapsodyo5ugy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fcd7ad05fba2.pdfIn PDF document text
    • http://cabinetsop.xyz/jolipubesapaguwurobani5win4.pdfIn PDF document text
    • http://youtube-subscribes.com/13893751364lquqx.pdfIn PDF document text
    • http://vykupavto54.ru/citing_figures_in_chicago_manual_styleyjaif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5fda4847e90ab.pdfIn PDF document text
    • http://123dutch.com/cub_cadet_526_swe_manualbohnr.pdfIn PDF document text
    • http://silkhfig.bid/tumblr_themes_free_codes5g61v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498678/normal_5fe5fc2645262.pdfIn PDF document text
    • http://mybestchan.online/dodaxetisitotozcet0a.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/sumipizowukalomi.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/pca_notes_on_aci_318-14_building_code.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://migumirokive.epizy.com/pugimudemoxuvobun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2905e701-79b6-4720-9936-a90bf6a6dd30/mikexifekesamosivazaxiso.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/wugugejew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc438334-9e73-4462-bc97-16413225f208/krk_rokit_g4_5_vs_7.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_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 5316 bytes
SHA-256: 41e073e1f767d4c62f8af084f539d4d15eed26b61d03e6f6c0943c7b337a2b62
font_01_sfnt_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 10736 bytes
SHA-256: 909afc0c29417ca374d6d11b99746f5de4418288388d736a0a64ed50ccb97ef7

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