Malicious PDF — malware analysis report

Static analysis result for SHA-256 8956fb1597aba623…

MALICIOUS

PDF

71.6 KB Created: 2021-01-06 04:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9539fba9685eeb95237f5479dbd3fc9f SHA-1: 7d27db19d17af6df6130c73d812d2ef6ec57bd87 SHA-256: 8956fb1597aba623855d3505564562e194e6f4f4d4fd15c2d2506535b4977d71
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, including one to 'traffset.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to religious content to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffset.ru/123?utm_term=la+santa+misa+explicada+por+padre+pio PDF link annotation
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/e85fd0a651b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fd95f0e1a411.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/wofegadonagexafiveg.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/c5abe325.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/mikibetiv/91972867088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c4b1f5-b6da-469d-afdb-6eb730763dc8/chapter_13_physics_class_12_short_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/62808154369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53be4da1-c5df-4943-b115-6c9bbe769181/toziribimov.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/55869125037.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/dibipovobakemego.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/kaweraguvopirebuwevugaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/fuxagutopepemujo.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/43951589500.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_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 5228 bytes
SHA-256: e74c29539b9b2ad087a256cc31f65f95a2942cedffc2eec33511f49ede680503
font_01_sfnt_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 11352 bytes
SHA-256: 0dd629da49a526c1bc8c99e773301789fc5e4ae1fea29fe39dde94ccd6525ae4

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