Malicious PDF — malware analysis report

Static analysis result for SHA-256 70dd982386caaf2a…

MALICIOUS

PDF

71.4 KB Created: 2021-01-08 23:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1042c23e75d2a0f8d9eed1132e706854 SHA-1: 130867d039bd9656a93f763bb0a4d216f85a0f86 SHA-256: 70dd982386caaf2ab092a9ae4f4969dbe0a30ee059d902ba997af4d810f885ab
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URLs is 'https://trafftec.ru/aws?utm_term=bihar+agriculture+road+map+2017-+22+pdf', which is suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=bihar+agriculture+road+map+2017-+22+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5f96d805f3aa6.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/gicjcgh/24783220185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390057/normal_5fcc16a78c0c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5feeaab8211d8.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/jeZ4phd/nudiwosupitawufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_5fd61bd652d16.pdfIn PDF document text
    • https://cdn.sqhk.co/foxinukepo/gdihhiC/splendor_in_the_grass_1981_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/ibFbgiY/learn_spanish_for_beginners.pdfIn PDF document text
    • https://jivefumo.weebly.com/uploads/1/3/0/7/130776755/2430f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417123/normal_5fdfc7587ae79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5febdabc9ce04.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/7809cd8f-1beb-4010-a73d-ded03641b2dd/74311401300.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_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 5876 bytes
SHA-256: d1c8c5a871c27395763dff54f57d71086c2f29793770ac5ba8d960b3bd9cc21c
font_01_sfnt_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 10408 bytes
SHA-256: 1044bd841d79001d1bad1a1131fb9ea1c7e25b73d9dca387f60f3d36578ea46e

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