Malicious PDF — malware analysis report

Static analysis result for SHA-256 9780662d47f09b6b…

MALICIOUS

PDF

84.8 KB Created: 2020-11-19 01:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5017f0c3b1af07d1a8c44d129548216f SHA-1: be64436e11eb179d0ddf03119929c3050ecef066 SHA-256: 9780662d47f09b6b9cb6108070fdd84a72b300f3148dd6b45a5635f54e6e5556
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, indicating a link farm or SEO spamming technique. One of the primary URLs, 'https://trafffi.ru/123?utm_term=armadillo+girdled+lizard+for+sale', suggests a lure to attract traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

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://trafffi.ru/123?utm_term=armadillo+girdled+lizard+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5fa560e2a51eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421061/normal_5f9e23a2c4c1c.pdfIn PDF document text
    • https://guzuzixud.weebly.com/uploads/1/3/4/3/134357052/karawuvelepapidup.pdfIn PDF document text
    • https://tokuguzeg.weebly.com/uploads/1/3/4/4/134464653/ffb5d135a8bc.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/81ca23772570df9.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/genedonapubefe/riwol.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/riverfest_2020_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316d69f7-f9d4-4ad4-82fa-e0e8237abe35/87449748634.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/penuropekekiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f01ccb-7822-483b-97f2-b0fad16ddb36/bufugejiki.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/valupen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69283c3f-219f-4490-9078-03a79f0cc0d8/dopesed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc50ce2-8fc8-4f11-a01e-d4069623c5ef/tedox.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/add_watermark_foxit.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/wetadijasowosijaxov.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/jumiwob.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 5264 bytes
SHA-256: c18d504d72d0f6a9d63b20c9973d4e66b47cca2e5c4f17a3fbedbc19d05219b8
font_01_sfnt_off000114b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B7 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 11188 bytes
SHA-256: aae30d6d82aaaeafbec86ab447fc215791e68847baa9592c3df034b4e8390b66

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