Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2ee52eb9ef9982…

MALICIOUS

PDF

72.3 KB Created: 2021-02-16 04:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e14cdd2d1d718e1f4fd7a2d94aa549e9 SHA-1: 525db1678702c8df0c356c2f61b78dd865496050 SHA-256: 1d2ee52eb9ef9982cab1bd7e4111566a75747820df983b481b42600cf66d96c1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are characteristic of a link farm used to obscure the final destination, which is a common tactic for malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • 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://baarspo.ru/strik?utm_term=how+to+clean+a+honda+mower+carburetor PDF link annotation
    • https://cdn.sqhk.co/pajerelo/bNrjcib/mewisisefujawavunawuge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377403/normal_5ff17a3a64e95.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/tZUMjcX/in_the_rooms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd3079081751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_600ea01698817.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/1700702.pdfIn PDF document text
    • https://zavowije.weebly.com/uploads/1/3/2/6/132680855/guref_madobipo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411246/normal_5fc851fddce0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460972/normal_5fd1ff7658750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_60265ae24a57a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newewixojarulup.epizy.com/29236911638.pdfIn PDF document text
    • http://xugibomexepef.rf.gd/mafugaxiwabatijav.pdfIn PDF document text
    • http://zinipaxafuzonik.rf.gd/chale_aana_lyrics_video_song.pdfIn PDF document text
    • http://sopexas.epizy.com/dictionary_meaning_of_academic_performance.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_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 5192 bytes
SHA-256: 7c725e6dbcd9e55a9f402437841cd407db6bb46c6ab1eb3c1294b63362646d87
font_01_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 10580 bytes
SHA-256: 0df3fb5d54e877c5a5363d19d2d13c8fdba0596133d76b1f404e2a6d06affe5a

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