Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b05f5032f07e99a…

MALICIOUS

PDF

76.8 KB Created: 2020-12-04 15:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e5eb3aac18b7b27aa674e965f902e284 SHA-1: 1e74f532cd62e1b4413e35f232cbcd26adadce95 SHA-256: 4b05f5032f07e99a642d566f3e64e1c8959f3348f0de96fb752fff497661d38e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/123?utm_term=torcon+index+today+2019+weather+channel PDF link annotation
    • https://wubepina.weebly.com/uploads/1/3/4/7/134721378/9996349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379374/normal_5f8d56c91fde2.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/134d576031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f9b652212467.pdfIn PDF document text
    • https://sogegagep.weebly.com/uploads/1/3/4/6/134687839/9691752.pdfIn PDF document text
    • https://wefanuku.weebly.com/uploads/1/3/4/6/134611064/kedotoxumuzov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460963/normal_5fc8b83379745.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/5fd7b57f-d4d4-4a4c-b29e-366c03642929/36026979370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678f0b63-de3d-4565-b745-8711cadbee29/povuwabutajofaxev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe4659a-c472-436f-8916-851fb0bfe565/25020026016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d80d08-2e14-4217-8266-c9e628239657/black_panther_comic_1966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad715e79-ab24-42c7-ad16-14c39c39bc01/27089420592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffd872c-0dfe-4121-9ad9-01560e648b4c/9332091096.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/69619724927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72074e54-7baf-42dc-ba79-20faf50919bd/mule_boston_dynamics.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/hepatitis_c_easl_guidelines_2018.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
stream_005_off00010657.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10657 18504 bytes
SHA-256: 39b0684d0459c1b889522494a18f64dd2fb0afd142dcfa2608a224dfbda635f9
font_00_sfnt_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 5540 bytes
SHA-256: 144650ae49b615deb86385ec4f87b362c02a2f0333d9820f943e93d2c6b1a008
font_01_sfnt_off0000e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 10520 bytes
SHA-256: 32ab0777cb567046e20e47ebdcfa21cb3545eb9ad29944255dcb323b44773ad3

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