Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c3988fa960d39d…

MALICIOUS

PDF

70.9 KB Created: 2020-12-18 04:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48cf84808a25fa8c2545c85bccadab0c SHA-1: 9b71d27e4a965b90adf75edc31936a355e442633 SHA-256: 26c3988fa960d39dda845c34cbe1928715d81b025ca0feb296a9e6339e866978
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://trafficel.ru/strik?utm_term=pegasus+shower+faucet+repair PDF link annotation
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/lemixap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445557/normal_5fa350674a678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f8e111f1295e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_5fa2064cbf07e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5fb4e507d28f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_5fa0bde46875c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fd7c211afd59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fb7f7c7bd70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f9115fb7664a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369318/normal_5fc952f624f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465539/normal_5faf400444efd.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/c634d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fc7a5c444667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383449/normal_5fc44bad9e727.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/nalifij/58915082307.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/tujedebasidalaxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11a4c405d5340f32abf29/t/5fc5646e6457125654f1631e/1606771823019/14693739445.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58e3dbd14ff0dd2bc3439/t/5fc6a8a761e25426e122de8b/1606854825116/zipowad.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 2

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_off0000d926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD926 5336 bytes
SHA-256: 8ecb458e1f327203285c1d5a30a73709c6a3045fbbe8b79f302635620b1ed0e1
font_01_sfnt_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 10288 bytes
SHA-256: 8d9cd180841af7bef65ec80316f6c536a89ad6f62ddfb44ec325057a10d9d620

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