Malicious PDF — malware analysis report

Static analysis result for SHA-256 65782120b0be09f6…

MALICIOUS

PDF

80.3 KB Created: 2021-04-03 09:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc63fd3b1aa8e3b4b1eff3709e587ae7 SHA-1: 52718a40ac2d6d9eed05eec1426079df8b02b53a SHA-256: 65782120b0be09f67aad6f69b93f655c9c710ea344691b0150257287afc4b8d2
156 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 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 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.
  • 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://mezovuduw.ru/wix?keyword=bosch+ra1054+deluxe+router+edge+guide PDF link annotation
    • https://pasetesosetoje.weebly.com/uploads/1/3/0/7/130775590/4567585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_605b54590458f.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/cc1e51c4486550.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/audio_cutter_apk_app.pdfIn PDF document text
    • https://wivozodibadire.weebly.com/uploads/1/3/0/7/130775536/mejizuvuguzesan.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/5966445.pdfIn PDF document text
    • https://naduxirakolanin.weebly.com/uploads/1/3/5/3/135304083/lazotobutipatuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_601b34d71933d.pdfIn PDF document text
    • http://biomaniks.website/3933122171czeg7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454048/normal_6030612791b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_5fe6d60a6a59e.pdfIn PDF document text
    • http://arevakar-travel.com/guide_book_template_wordij7xn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_60359f31d6901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soripijadob.rf.gd/17535764233.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/definitions_of_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/jagigeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/formation_auriculothrapie_lyon.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/how_to_calculate_engine_thermal_efficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/87620943384.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/2018_chevy_cruze_diesel_manual_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/57870506998.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_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 5724 bytes
SHA-256: dc3ec99a1042084d9cda410fa3dbac6627c9d4036ef10ec8d7b171661f08a1be
font_01_sfnt_off00010a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0C 12508 bytes
SHA-256: 5ad1686bb4a5143bc7364e4d1ab77d6d2361c21eaf5d47b8559a2126e2493102

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