Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee0fb4f746dafd8…

MALICIOUS

PDF

78.0 KB Created: 2020-11-25 21:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7775bc5af3aac8347b3b81ab7e1a6e2 SHA-1: 1266e2b6c032d48b0787048e46040bb3c8b41338 SHA-256: 8ee0fb4f746dafd85c11c4147a166c62d385702b1564efaf27468c1fc22a17df
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to Weebly-hosted PDF files, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=seth+speaks+pdf
    • https://kotonimurapuva.weebly.com/uploads/1/3/4/4/134440920/5c77a0a4e.pdf
    • https://dolaseluxi.weebly.com/uploads/1/3/4/8/134871763/karelasodowip.pdf
    • https://monazixoniju.weebly.com/uploads/1/3/4/6/134694361/516b97.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jukoxisojow/a4_performance_shirt_size_chart.pdf
    • https://s3.amazonaws.com/sajatesawodiji/nekulijadesipefurorema.pdf
    • https://s3.amazonaws.com/gazitif/poe_trade_channel_for_maps.pdf
    • https://s3.amazonaws.com/tesasubawalozan/75799302229.pdf
    • https://uploads.strikinglycdn.com/files/33d475c2-6b01-4b04-b516-8900c7ae4921/43472818602.pdf
    • https://s3.amazonaws.com/bajuse/17052385716.pdf
    • https://s3.amazonaws.com/resixexi/61984035715.pdf
    • https://s3.amazonaws.com/kotenu/tamilyogi_movie_online_hd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f562.bin
1ca7d517142606a9f88ec9c57bfd28ac30f258157186333b89ff39ad732b3606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 5168 bytes
font_01_sfnt_off000106fa.bin
695b9cc43aa172545b878c4f92f7693996cc6c0301f18598242fe77174edaa46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FA 10744 bytes

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