Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1b717921b68f88…

MALICIOUS

PDF

87.5 KB Created: 2021-04-02 00:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fee5820147bf48e31a609c232c9c6dc0 SHA-1: b00caafbe7622c1b1cddac9bba50570d3c910686 SHA-256: ad1b717921b68f881d90045079abd756fea98406c9e27a785ff27f487f1c6d15
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=peter+griffin+roadhouse+driving PDF link annotation
    • https://cdn.sqhk.co/fujalapevame/hiblibt/30893521693.pdfIn PDF document text
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/ropowedusave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fd68b45de9d8.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/19gfihc/44897576124.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/af995748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_5fd7d037b9cef.pdfIn PDF document text
    • https://ranefizowu.weebly.com/uploads/1/3/1/3/131384017/4670882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_6022931e5e48a.pdfIn PDF document text
    • https://tojumofudino.weebly.com/uploads/1/3/2/6/132681199/805216.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/519f67f5f3d7.pdfIn PDF document text
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/karelekemanisew_soralimeneji_kaxajinuvuvizi_bubug.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/3dc19269ad2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_4c02ef3c36e74317a7ffc569d955749a.pdf?index=trueIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_9d2b6414e1804366bda2dc7ca5d7aba4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/848fdc39-1b8c-4d83-a3ab-30d80a3ba769/a_study_in_scarlet_audiobook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9991fe8d-9ab5-4c12-b36d-024e1e08416e/james_baldwin_the_price_of_the_ticket_documentary.pdfIn PDF document text
    • https://9f61dd91-ea7e-4edc-a837-c43fae5dccfb.filesusr.com/ugd/ed897c_bb92c05dcf5a496eb271595e252bcd1c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 3744 bytes
SHA-256: d615bfd4f766b0dcf14685ba512ef39d9684782e1d84078eb0d68251c90f35f1
font_01_sfnt_off0001154b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 5200 bytes
SHA-256: 98cef20feb9ac74e8689f95d021fd1370254253e9d8de6025527dc77a850c895
font_02_sfnt_off00012700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12700 12060 bytes
SHA-256: 1707f65fd4cd2659901025bcb33c5606e5dcc95643011c5123256d1efddc5cf3

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