Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80bae2f823b8b09…

MALICIOUS

PDF

67.6 KB Created: 2020-12-19 07:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbc7cc0bf781901ddb1e6d5fc3e8c60c SHA-1: 377929853a6dc54fb49313c8e03d28b7f3cae0ce SHA-256: c80bae2f823b8b098513ee2b2e0c9521e4090e385021e102e8a5bad646547736
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a URL with a 'utm_term' parameter related to 'planned parenthood poughkeepsie' indicates a potential phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 6

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://traffking.ru/strik?utm_term=planned+parenthood+poughkeepsie
    • https://siveruvamavekug.weebly.com/uploads/1/3/4/2/134266289/minumugeseg-ridamikorol.pdf
    • https://pokezivakizame.weebly.com/uploads/1/3/4/6/134619377/rimikubow-futogexevona-davolojekidix.pdf
    • https://karivimefoga.weebly.com/uploads/1/3/4/3/134311068/7042496.pdf
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/wuziwa.pdf
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/8636682.pdf
    • https://cdn-cms.f-static.net/uploads/4416131/normal_5fb4b2c5b2734.pdf
    • https://mojibivod.weebly.com/uploads/1/3/4/4/134490358/6461876.pdf
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/xogowexitif.pdf
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/pojakare.pdf
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f985691c9bde.pdf
    • https://cdn-cms.f-static.net/uploads/4454968/normal_5fbc78290921e.pdf
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5fc55e782158c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc522e660f2895dc10348e3/t/5fccf675c836a917f90e859f/1607267958318/movie_now_showing_cineplex.pdf
    • https://uploads.strikinglycdn.com/files/0c65a64b-19a3-43c3-ab7d-724430286297/nabugeminin.pdf
    • https://static1.squarespace.com/static/5fc5104c9698b02c7f3b6a9a/t/5fc9afd38562787517582a28/1607053272714/42394263460.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb6.bin
7e85630081b2d9ec74836983f7929b5d573a00ee5b3bfea621c25a198bd2a9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 5168 bytes
font_01_sfnt_off0000dd3a.bin
3b278a26c52c8b9687a3f9b4a1cd24571958bc9caf10054f013f7236aec0e9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 10468 bytes
font_02_sfnt_off000100d7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 4324 bytes

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