Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e62ed5ee43a3da7…

MALICIOUS

PDF

74.0 KB Created: 2021-01-06 02:07:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 86a8a0a4e5e4fc71956d0acca0436f84 SHA-1: b0312ee8bcd5aaa47b75a941c668f99fa41ac9a8 SHA-256: 5e62ed5ee43a3da7eb51d209985802b55d18d48f4d36de48f863b9d80437802b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, indicative of a link farm. The primary URL, 'https://trafffe.ru/aws?utm_term=timken+bearing+interchange+guide', suggests a lure to disguise the malicious intent. ClamAV and ML classifiers strongly indicate maliciousness, with the latter outputting a score of 0.9997. No scripts were extracted, but the structure and URL patterns are consistent with SEO spam or phishing campaigns.

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://trafffe.ru/aws?utm_term=timken+bearing+interchange+guide PDF link annotation
    • https://pebewaviwukak.weebly.com/uploads/1/3/4/4/134463457/3d9a23239c06a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_5fc28b64eb167.pdfIn PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/mizebaxizipezida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445338/normal_5faffcee6747b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_5fd91150e65b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fd84b77c85d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5fc9a7bc28bb9.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/5919441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5fb8a8f2c60e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81bd39b-5948-40f0-881b-36b547ee385b/wuzaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d38ffc4-2443-4c93-a180-3d250555c5da/37352262346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ce188b-adc9-47fe-a16c-9e3c2a4cdf00/68226443023.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/formal_letter_for_certificate_attestation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 5296 bytes
SHA-256: 102b8a5c660938eb1bee381fac9badfa875aefe18f8a03cbc46449ae554eefde
font_01_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 2108 bytes
SHA-256: e2bafc4364e6d6b986abb62f8dad7bbc84fcdddfc7e738cffae9bddef9bc1c72
font_02_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 11744 bytes
SHA-256: e11552c19ed4ba187f167d68336f728d80195900261ea90e08a1ffddeb487992

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