Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dc274546ddae39…

MALICIOUS

PDF

70.9 KB Created: 2020-12-20 03:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 014cf977b387599c56836815dd44931d SHA-1: c398d055ce9d7d593a707352c103fc751a4e57c7 SHA-256: 82dc274546ddae39534e1c32d8466a386b49e4d7980c04d218dd90e59a53cd69
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to redirect users to malicious websites. One of the primary external URIs points to 'https://trafficel.ru/wb?keyword=off%20road%204x4%20hill%20jeep%20driver', which is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support the malicious nature of this document.

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 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://trafficel.ru/wb?keyword=off%20road%204x4%20hill%20jeep%20driver PDF link annotation
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/rawepumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f87bf4dcfec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5fbbcd5ade7fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f87461788035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421365/normal_5fc98c85d5230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fb2d2396a696.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://s3.amazonaws.com/tugumeb/unfinished_furniture_seattle_wa_area.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/horse_isle_2_quest_help.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/water_pollution_information_in_marathi_language_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/xakovemiwelopu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b538feeefa0c0b63a799/t/5fd18d80ce71ee580fa446f4/1607568769141/35967882151.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/sitijajeridozaniwus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc971c8c741314319700/t/5fc3f0012dd96f5918677d74/1606676481435/besidonibeponupikawu.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_off0000c256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC256 4872 bytes
SHA-256: ee932e7e7644da249714aed2de34478e524e140554d883622be2ada4e32695bc
font_01_sfnt_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 14732 bytes
SHA-256: 7ee97d9e4226a609f31c5a1ebb2fb323668d44090e9dd60c94d31092040869ed
font_02_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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