Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df4f6406afd9635…

MALICIOUS

PDF

86.4 KB Created: 2020-12-02 09:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b8ade54430a9151b354094f9cd9e512d SHA-1: 2ca62ed51e7ac9d125d6e0734a9c71eec790f069 SHA-256: 9df4f6406afd963515c800ea93cf1f5c67ed0f8b3c4928f1d81cdae31b0331ed
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=warlock+pet+attack+macro+vanilla+wow In PDF document text
    • https://musuvawe.weebly.com/uploads/1/3/4/5/134528527/7291957.pdfIn PDF document text
    • https://gerexogevi.weebly.com/uploads/1/3/4/4/134463414/minowamiwatadu_vimivoparoguno_kixobunukegox_forakap.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/lemil-wekug-foliriturugubo-kafuj.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/mifotorobek.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/bigasofosuv.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/a4b6272.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1116c11f6a41984869c2f/t/5fc18a2d3c6ccf69f3985338/1606519342358/what_do_the_7_dragon_balls_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/xuzipoxupogudi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/aane_wala_pal_instrumental_saxophone.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/raxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875bf28e-0194-4755-bcd7-a1dee90e9bfc/xajodamimuxufexedo.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/21396709050.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 5128 bytes
SHA-256: 6a5c08d92fb732a29fa79ec4fa4e0853bc32cf7e940d8b11af984fe80bb76d69
font_01_sfnt_off00010f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5B 11608 bytes
SHA-256: 970287cf44686f3369e7852888229ebb0cc9a56384c5ce0a72bd6c85e43ab8f0
font_02_sfnt_off0001372d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372D 16340 bytes
SHA-256: 4f9bddd8120402856594b33adaeac6aa436e26f5eb63b748bf1666df64cd7ce8

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