Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa0ae91a9c2d26a…

MALICIOUS

PDF

85.3 KB Created: 2021-03-23 03:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8e5f15e8d4e37d8b728a0eafb9ff1bf9 SHA-1: 5aaf11a25f889b6c2dbfd17e135bc75a5521527e SHA-256: 1fa0ae91a9c2d26a2f6a75810328b28a13d84a990be05b0759cfe7713486d41f
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://golowaki.ru/wix?keyword=contagious+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fdd34351edeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_602222f93ab7b.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/home_zone_led_motion_sensor_security_light_costco.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/lefakupopani-fiduwu-jipatasop-toxosasa.pdfIn PDF document text
    • http://watomidipokaki.22web.org/vejexafuwojaf.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/xatukabajemopuzasur.pdfIn PDF document text
    • http://negeduji.66ghz.com/chicago_tribune_jumble_answer.pdfIn PDF document text
    • https://gubijebe.weebly.com/uploads/1/3/1/4/131483267/aa6c650b6b0d96e.pdfIn PDF document text
    • https://gaxezoxo.weebly.com/uploads/1/3/0/7/130776828/vumojesefu_midam.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/corporate_social_responsibility_towards_owners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/17fa640f-7896-402c-a046-d93bd2348dbc/skyrim_how_to_enhance_enchanting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2342490-d88e-4fd7-92bf-ec9d2a79c65c/67691338033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca2dbc2-6f11-4a9b-a77c-b858076a0ba5/56386751810.pdfIn PDF document text
    • http://bajaxugezozego.rf.gd/digitech_jamman_stereo_manual_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27bc143-98ce-4509-be54-f50a6a9f15fb/how_to_ace_a_competency_based_interview.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_09d080e647a3485dbb36739387601563.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_2790e1ae307a4b709320a85b5627e12f.pdf?index=trueIn PDF document text
    • http://lokujafeb.rf.gd/fimezijor.pdfIn PDF document text
    • http://vefazuxugog.rf.gd/translating_algebraic_expressions_worksheet.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_off00011274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11274 5108 bytes
SHA-256: 2e007c7685a74fbfef0d3300d04d6f2edccb54f3fb7cbb39b3370c3ec0771375
font_01_sfnt_off00012402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 10648 bytes
SHA-256: f98203f7eac53ead5ef6cc8b45abc2258ab27393aa304f2b2ad6e286a91d65fd

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