Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1f30800d559619…

MALICIOUS

PDF

77.3 KB Created: 2021-04-04 20:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d6e0f1a2636462948c35e619d3a763e SHA-1: 19ffebc6540aadbc7fd30be1adafa64f7d6a6a90 SHA-256: 9d1f30800d5596197db295a61283cb1d21cdf41eaf54df55266d261924c39973
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=beetalk+3.+0.+8+apk+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455380/normal_600ebd07b055a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_603d6edb42dad.pdfIn PDF document text
    • http://rimisirotox.iblogger.org/spring_framework_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_601c614939eb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501503/normal_5ff4beb53e429.pdfIn PDF document text
    • http://bowoluzin.iblogger.org/95016952995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_6029782b24a6b.pdfIn PDF document text
    • http://fonabibexame.iblogger.org/lujega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fdf39ff91436.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_112607ce51ae40618b20d2d561e63b86.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_6827760582894f738eeb8aae404daa4a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74471db5-8cd0-4cf2-b760-7300f1d66f97/51635809399.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/canada_food_guide_servings_for_seniors.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/negedoweserabezumo.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_3feff66b6645471eaecc2a7a3fcecf58.pdf?index=trueIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_7dfea58300e042a0b9a19d6db4f3cf65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5073f35-4b35-43ab-bb6a-acb48072866b/what_legendary_pokemon_does_red_have.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/90125651696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1106ce-03f5-4a7e-95fe-21b4000e6697/57670326362.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5044 bytes
SHA-256: fe6b0b380b5917de705fc35f365f04acccc8cfd59d1a9774b22f5b847268a4bd
font_01_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 10752 bytes
SHA-256: c3a8af41d6ac88334ac3473671b10e22a9811f993140ee3059944bbae4a98d34
font_02_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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