Malicious PDF — malware analysis report

Static analysis result for SHA-256 886b5ef202bae405…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 02:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 20adee90cc82c94b9defb48644694ea8 SHA-1: 817cd20722f9ab6cf8a325742c25f970bbcfeb13 SHA-256: 886b5ef202bae40579cf70ae184d88e9cc51b85d1b399950ab85da9c1084d9ff
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://botokaw.ru/wix?keyword=judgement+apocalypse+survival+simulation+cheats PDF link annotation
    • http://bobujopolodusol.mygamesonline.org/krups_oblo_coffee_machine_instructions.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/pulse_code_modulation_nptel.pdfIn PDF document text
    • http://energytik.net/99596677869yv3m3.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/iZjfhaL/16469469708.pdfIn PDF document text
    • http://student-yurist.ru/zomefa54o72.pdfIn PDF document text
    • http://rcasino.info/teranulamehbvrf.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/icA5jjT/pick_me_up_quotes_for_her.pdfIn PDF document text
    • http://sfr-espace.best/zosalop9ptl7.pdfIn PDF document text
    • http://laura-egorova.ru/rekuvamehxade.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/jDdIAha/clear_guard_transparent_film_screen_protector.pdfIn PDF document text
    • http://dirtygirl.fun/daxipasovusurulifoz90cqv.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/hageib9/velupijakivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibimom.myartsonline.com/atlas_of_canine_anatomy.pdfIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_274fa996de1f41bb979e392649341b27.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_130178b95d6c4d8686ca7619d780f2ee.pdf?index=trueIn PDF document text
    • http://zaduzos.myartsonline.com/sokosukiboxadarug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29fd6e46-dc06-4e16-8eef-c6aa0e3eec88/what_is_the_best_self_tanner_at_ulta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311f4a90-02a9-46c2-92ae-1cc77dd28575/77848750850.pdfIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_5893ab6ba6ce4b9a853949acd1e28c38.pdf?index=trueIn 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_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 5640 bytes
SHA-256: e441271c98546dbc0bb5673b657b8e5a9cd3f334dad90102c8712111d7761e93
font_01_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 11436 bytes
SHA-256: a25dbd864df05d81857270aeea016b791d45482672232e9fd9847458b5ae42ef

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