Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9218c47c830900…

MALICIOUS

PDF

76.7 KB Created: 2021-01-05 07:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6aa285bff6af1827d476f08dc44c47b2 SHA-1: d7ebc068b1fef72829c1eb851b006decf34428e7 SHA-256: 9f9218c47c8309008eda89140fafe2f1f43fc9aa092a11776d64a3c99321eb29
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs, such as 'https://traffset.ru/aws?utm_term=hastens+bed+sheets', likely serve as entry points for further malicious activity or to redirect users to phishing 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
  • 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.
  • 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/aws?utm_term=hastens+bed+sheets PDF link annotation
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/matalawunan.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/xupibejeme.pdfIn PDF document text
    • https://nexuragero.weebly.com/uploads/1/3/4/7/134751893/folumixurumerob-miwefebalejol-wepozigukara-loguwig.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/434012.pdfIn PDF document text
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/891945.pdfIn PDF document text
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/vezojenona-juzedezajoriti-mozopi-miteli.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/rWha2Ts/army_toys_town.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5fc2503936fb0.pdfIn PDF document text
    • https://vupolape.weebly.com/uploads/1/3/4/7/134749420/e70cf528f2.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/QcrVjfm/70225493403.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
    • https://uploads.strikinglycdn.com/files/7a3bd0ff-2e3b-4bcc-9426-c9c9859e8c8f/66838064942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb60989-a7dd-4608-992c-02a66dd7deb9/67190963717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caae069-7b92-4e33-9424-8913f0ca76e7/google_classroom_themes_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe7bcde-017d-4f40-8a88-03fb41fb8527/nte_relay_cross_reference_guide.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 4516 bytes
SHA-256: 73bc6d4f2dc4e4bde3e56e21ae03f00089f58630f9857c575e6bf598f7c4b706
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 10756 bytes
SHA-256: 54307b94e55948392fecbb165c9df075f28f8e00483815142a5190ac2860a86b
font_02_sfnt_off000117ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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