Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a2c8cbe8a20f46…

MALICIOUS

PDF

70.4 KB Created: 2020-12-15 18:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6d8b6b1ca5b517108b0599dc77a9f4f4 SHA-1: 069c6b34d1c8eb1b60d8a30583dbb07174c787cf SHA-256: 04a2c8cbe8a20f46dd04f5c40a4892fb2e5e05b027c77ad7174969d1de84d581
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 of which are to SEO-optimized PDF documents, indicating a link farm strategy. One of the primary URLs, trafftec.ru, is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/strik?utm_term=tomb+of+sargeras+ilvl+requirement PDF link annotation
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/2542e.pdfIn PDF document text
    • https://jigulukeduza.weebly.com/uploads/1/3/4/5/134508725/8624143.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/3625782.pdfIn PDF document text
    • https://pagurewitapusak.weebly.com/uploads/1/3/4/6/134632053/miwugijim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc51282e9fc3622d53cd60e/t/5fd643dec4373837b906e04b/1607877601468/9482337836.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de01bd14ff0dd2be9a03/t/5fd11faebd7940538c0606fc/1607540657412/fugosazatej.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/nucleophile_and_electrophile.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a7d717e72026400a7969/t/5fce006bd235d37878eaf6fd/1607336051573/adobe_photoshop_lightroom_cc_apk_app_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5169dbe9b69395125da21/t/5fc81d466652ad59ec1ba504/1606950215776/zombie_apocalypse_survival_kit_weapons.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/simple_ceiling_pop_design_booklet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 5364 bytes
SHA-256: cf4eb2d76cb552ac7735b6ad62db78f0a8e3298ba5a4b38f520eb5b7bb5a0c7f
font_01_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 10656 bytes
SHA-256: 93bc38c800d06e6362f3c99908eb064197cfcdcf3980390635adb5ff4ae42654

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