Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6eb85ed89c2cfea…

MALICIOUS

PDF

78.3 KB Created: 2020-12-22 06:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1f143fe544b25cb6b9e6bf99ece194ee SHA-1: e543a98d59e0b3e0487d558a63314550ccee9c24 SHA-256: a6eb85ed89c2cfeaf4433433e6fbacc05beb65593be71304bc8a9c93b95ff9bd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' and another flagging it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to Mars rovers. The presence of multiple external URLs, including one pointing to 'traffset.ru/strik', indicates a phishing or malicious redirection attempt.

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/strik?utm_term=interesting+facts+about+mars+rovers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5f922e7e6f7a9.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/0a84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5fa69ba06d868.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5fcb9c5bc8865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f998b166f10f.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8659590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_5fd81a356ff44.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://static1.squarespace.com/static/5fe01fb3546cca2c4160e82d/t/5fe0df1e870645154a216d92/1608572704173/carlsbad_bmp_design_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bc1dac-a532-4b3b-b56f-3c2c3b338eb4/wutekibagunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1982d88e-8815-4d70-b468-3c8a3275b041/jojoke.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef12d9697205d6f6633f7/t/5fd1e4f2a9eaf43bd8571c23/1607591155133/grand_theft_auto_online_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25da8f69-04d5-474a-bc7a-9161ab7b1664/xozemuguwa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56d376b97992eb57a16b7/t/5fc7f3972dcd377f39bbd046/1606939544843/the_collingsworth_family_ever_faithful.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5ee5f8cdb769c6da7f7d/1606377190178/guppy_breeders_in_ohio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e9518e72e5fdbce14bf/1606373014294/california_astrology_association_horoscopes.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_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 5188 bytes
SHA-256: b67ff69948463e5518c4ea53106eeb6ba9b55b35742c5ca3d76a82d2631c7910
font_01_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 10488 bytes
SHA-256: d4dc3ff658ab6d792d8e4936d4570c1697cde62dae118e0b283a34522e3d506e
font_02_sfnt_off00011c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C78 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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