Malicious PDF — malware analysis report

Static analysis result for SHA-256 7290ad3bce17b21d…

MALICIOUS

PDF

75.7 KB Created: 2020-12-30 04:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b8bb10af2e5e5aa2a2835fcf051eac39 SHA-1: 32577c4418eb0c0ef99c8918a612aef435f863f9 SHA-256: 7290ad3bce17b21dcda34816648264babe1213147a68e3d07fc86eec7b04488b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, with the primary suspicious URL being traffset.ru. This suggests the document is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

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://traffset.ru/123?utm_term=question+mark+mysterians+96+tears+lyrics PDF link annotation
    • https://beluloxepivizor.weebly.com/uploads/1/3/4/1/134131295/tisipiviwar.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/xisodilijukivo.pdfIn PDF document text
    • https://tonofoku.weebly.com/uploads/1/3/4/0/134096462/01c46.pdfIn PDF document text
    • https://tunajixawovu.weebly.com/uploads/1/3/0/8/130873758/vidorim_fateleredipal.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/bogegova-narigogebo-butunosirimo-pavunapufev.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/081b1b6e-f3ca-4efd-afbb-41b36eaf0973/84520245766.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/11121556599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7250be-97d4-45fd-abc2-2dcf8ba216a8/wodanudeturavimidegevozat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d102239-614b-4397-ad2b-808569b27c19/gacha_world_full_version_download.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/51751663828.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/nemixejuzekavifebilad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0b1c92-61cd-44ef-93c7-1cd5a8debbce/venufexugejineniwepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34792fc8-8897-48da-bb20-faffa20bc912/nesumumezunejebix.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/4568984858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc12b828-654b-4938-8754-95a4c4b85ec1/parrot_drone_spider.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0433a7c6-9283-4124-9caf-0ddfd24091f1/big_ten_10_baseball_standings.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_off0000e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D9 5484 bytes
SHA-256: 1d25e1d331fbe055d4d602508e748930ac170324d700a685b776f18c60bf848f
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 11304 bytes
SHA-256: 36ca475f21c6f5c1280a8f41a8197d0d6feae7841e70299f8f0e5f98090e3c88

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