Malicious PDF — malware analysis report

Static analysis result for SHA-256 9659b92035752f60…

MALICIOUS

PDF

66.8 KB Created: 2020-11-10 22:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c003f4ed0e025388eb899d84721e347d SHA-1: d5bf255e501a10e50cc9fb99da4a583de2e4ed01 SHA-256: 9659b92035752f6075bdfc7ecaa6a73a0f0cc5634e996462853a514f902cc65e
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 0.9998

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 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://traffnew.ru/123?keyword=high+school+chemistry+pacing+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5f9fcb8a48eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5fa2fed4be6bf.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/3235207.pdfIn PDF document text
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/0b5146ccb4e3ae.pdfIn PDF document text
    • https://pesawesezopi.weebly.com/uploads/1/3/4/3/134327800/1701827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408601/normal_5fa1bb798c607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/94916595357.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/32604836621.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/the_kiss_of_deception_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nebojoluzu.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/nixutirabodumutidamox.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/70019383507.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/bill_nye_motion_video_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/marvel_s_avengers_infinity_war_prelude_2018_2.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_off0000c9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E6 5548 bytes
SHA-256: b1d1e1dfdff1b88b6bc8d27ce618b441a4ab5d095fae18c6a90656c89b3036c5
font_01_sfnt_off0000dca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA5 9948 bytes
SHA-256: 0d4912e7ac8179216f00f5688e27dd015b7b2be8a1848d61340d39ba1ebf9352

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