Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d5497a59070090…

MALICIOUS

PDF

89.4 KB Created: 2021-01-26 09:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9a04d94352aef1c66907871dfe6e7932 SHA-1: 0b06c82ad8e8394c51c4dae85e6c2d204a0d8ce8 SHA-256: 44d5497a590700904ad00a7b5f67f0d7f2f7f5f0935c3910d7033c367b7e07c8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. Several of these links point to unknown or potentially malicious domains, suggesting a phishing or content distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://trafffe.ru/123?utm_term=evolutionary+theory+definition+government PDF link annotation
    • https://zalajugimawif.weebly.com/uploads/1/3/0/7/130739284/42067.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/ghhXR6R/at_t_protech_insurance.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/hSygdia/beyblade_burst_app_mod_apk_8._1.pdfIn PDF document text
    • http://makeyourself.xyz/lotumerupemunelageganolukzmc6.pdfIn PDF document text
    • https://luxakanodaz.weebly.com/uploads/1/3/4/5/134589800/mitawoduzukow_kunujugi.pdfIn PDF document text
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/mupater.pdfIn PDF document text
    • http://edayafar.xyz/143061650366v6vw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_600e542911eab.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/7gfgi6Y/72512292399.pdfIn PDF document text
    • http://trickyturkey.com/suppress_definition_antonymbp3sd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_5fda6d26be565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_5fdc35c1b1248.pdfIn PDF document text
    • http://hookup750.website/murder_hornets_washington_statewmnnv.pdfIn PDF document text
    • http://creamwalls.online/221117699786q02a.pdfIn PDF document text
    • http://teenagetutor.net/mlb_standings_scores_yankeesek8pt.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/2712799.pdfIn PDF document text
    • http://ductsunlimitedins.com/tutudezuvrwqp.pdfIn PDF document text
    • http://muzoc.xyz/pepuzakilinawujifixoniz3w7f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/mojanabedipiwopoweta.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/zemuguwejogabi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/chanterelle_mushroom_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/dawevusatesududajo.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/duvaxotodujawase.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_off00012075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12075 5264 bytes
SHA-256: ba23bbc507154112f8bc4bcd5a1d973ba0009a6b753a6a10565e456e4c6bb62b
font_01_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 11212 bytes
SHA-256: ae97f03dbe13aa0c5afb3ce39bf7151dfdf053cbaa8cc060e1c92b7e3c8d7962

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