Malicious PDF — malware analysis report

Static analysis result for SHA-256 369a92c15762eea8…

MALICIOUS

PDF

75.6 KB Created: 2021-01-07 21:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f0187bccb30c9dbe5f3ef4595264c85a SHA-1: 211a5fb95cea49a3bcc91eef7ddee6ac37f1236c SHA-256: 369a92c15762eea8ced3466ef13e137da77ea582de8bb3f5e4b3e677530989ef
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded URLs, such as 'https://traffmen.ru/aws?utm_term=prescription+drug+mixing+guide', are indicative of a lure to malicious sites.

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
  • 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.
  • 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.
  • 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://traffmen.ru/aws?utm_term=prescription+drug+mixing+guide In PDF document text
    • https://towimoni.weebly.com/uploads/1/3/4/3/134340956/zofugojiluza.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/miajfRM/spin_vegas_casino.pdfIn PDF document text
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/8728656.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/RC6t97D/13719204618.pdfIn PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/zukapuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fa3d765969c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fdc62b1dc274.pdfIn PDF document text
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/fenuwemegudekol.pdfIn PDF document text
    • https://cdn.sqhk.co/lojavowi/2H5lAie/skywars_codes_2020.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/853998.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hdph5IK/57202300326.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/hjbwGhg/gidonididupufukenif.pdfIn PDF document text
    • https://lopolovugafi.weebly.com/uploads/1/3/4/1/134109017/4657047.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
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 5100 bytes
SHA-256: 2edc3b3383a15da75d6ad51c733f4146dcbf3877849d3444cb280aa62e57a739
font_01_sfnt_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 10144 bytes
SHA-256: 637d2847d1fa077c184955d9bd97ffc03eecbfda248ad2bb999e16f50841c0a0
font_02_sfnt_off0001139d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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