Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40e4f76810ae309…

MALICIOUS

PDF

68.1 KB Created: 2021-02-26 11:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 28de1216aa78c99796510b9becbf7373 SHA-1: 233b65fad83d118b93a9f418babdba318afdc37b SHA-256: d40e4f76810ae30991644aef1105be10b404d6d5f9f90e193334893263f1b865
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8883

Heuristics 4

  • 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
  • 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://botokaw.ru/award?keyword=trimble+access+desktop+emulator PDF link annotation
    • http://bidizujimon.getenjoyment.net/gufovudabawewotudozawen.pdfIn PDF document text
    • http://zirisumiwuxi.iblogger.org/definition_of_media_information_and_communication.pdfIn PDF document text
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/5635864.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/pimogijupig_sogoju_fomig_lomiponov.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/a195e.pdfIn PDF document text
    • https://vamewufu.weebly.com/uploads/1/3/4/3/134317042/90aa6aeee0a0c.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/b332a0705b9228.pdfIn PDF document text
    • http://jipevuzugegusol.22web.org/ipcc_exam_date_sheet_2018.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/buwufuretafidetoso.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/java_8_stream_map_collect_example.pdfIn PDF document text
    • https://kowelisabames.weebly.com/uploads/1/3/1/8/131857626/2357240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botujovibal.rf.gd/broken_heart_english_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/soldier_fleurie_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/fujonajekaselenuruwevipaw.pdfIn PDF document text
    • http://tumitodutib.rf.gd/mumapoz.pdfIn PDF document text
    • http://zusagijumetuze.epizy.com/38011481523.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/lifebook_2021_taster.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/33469622944.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/dobutamine_davis_drug_guide.pdfIn 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_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 5372 bytes
SHA-256: d7c90a88dce651040515b9645f5c5434b4643e38d09498de2e55bfae602ff3ae
font_01_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 10776 bytes
SHA-256: 281fe10d6e001257f040effba486fa0c77433f6e21340837e1fc192a0a06c174

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