Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c8391384793514…

MALICIOUS

PDF

73.4 KB Created: 2020-11-18 08:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa750557576110b351cdda6694327eb9 SHA-1: d013077f04cb7e1dd9c8494f96754dd22956b0fa SHA-256: 09c8391384793514f1e46b3340984cddbc20f537acacc497d874ab4882e55b19
244 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed for SEO manipulation. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading a script, suggesting it's a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/123?utm_term=heathers+the+musical+full+script+pdf+free+download
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/4851893.pdf
    • https://patekakedosejot.weebly.com/uploads/1/3/4/4/134479085/86a5b0.pdf
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/40b808dd9b7.pdf
    • https://fulafokowezoje.weebly.com/uploads/1/3/4/3/134384829/1e647bb8b59b10.pdf
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/suvib-labifoxorisod-wevakimilirori.pdf
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/1c9fc92d.pdf
    • https://dibozavo.weebly.com/uploads/1/3/4/5/134501923/wobedufeji.pdf
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/8e760.pdf
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/pategeralipufi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf6c3ed5-e6de-42bb-aea5-c90b96fefc67/words_begins_with_g.pdf
    • https://s3.amazonaws.com/dezajok/analysis_of_the_dinner_party_by_mona_gardner.pdf
    • https://uploads.strikinglycdn.com/files/6740bc25-5a38-4888-b790-51fdeab23f51/61595454217.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_off0000e270.bin
0d7497a013222a902a7340f08977b10f0e8cfdeb565d9d64f88f133396ab5a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE270 5448 bytes
font_01_sfnt_off0000f4dc.bin
291f4c0ed0ed6a82d7f26f05869f80e920b3914134e9894576501ac1d46b9c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DC 10488 bytes

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