Malicious PDF — malware analysis report

Static analysis result for SHA-256 42de7e6e9b5d7825…

MALICIOUS

PDF

69.3 KB Created: 2021-03-07 13:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01606371a353314b3e9f9ec269f36e77 SHA-1: cec5d22889144fb55d06ddf2af304fffa870e779 SHA-256: 42de7e6e9b5d7825c28cf70efc1f1cf95e28d1adf596bede4404c656b8ff620e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=hp+elitedesk+800+g1+usdt+memory PDF link annotation
    • http://xiwakaravivomik.scienceontheweb.net/88812627133.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/delonghi_1500-watt_ceramic_tower_electric_space_heater_hfx65v15l.pdfIn PDF document text
    • https://wesatelifap.weebly.com/uploads/1/3/1/8/131871597/wefobevanifiku_sixumibo_xitifigares_duvilikapo.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/79598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_a5865636bac144b2bafd1bf6df71efc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/human_body_template_female.pdfIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_03f31e7b2878463f9c1454ee5338997c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voropa/beekeepers_bible.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_48356f36a2cb4dddb4c19442312ca009.pdf?index=trueIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_13b0a29b69e04efdb8eb62dbe05e7197.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_611484ddc9394c399ea8cd78c8a6ded3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/2678534882.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/rogafupo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/angry_birds_transformers_hack.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_5332f35fd68b43e385fedb7875413d11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novifamigot/play_tamil_new_songs.pdfIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_a716a15eeb3a448f87d18697f92118f9.pdf?index=trueIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_e7befcc75f2944189fd342daa5d16c32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/european_commission_albania_progress_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/how_to_make_a_word_document_form.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_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 5584 bytes
SHA-256: d5a779d98651e7a236801d691b34a53a5c8be94fec85c91f91ec8a200ce177a4
font_01_sfnt_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 10900 bytes
SHA-256: d58764f1c96a8b0f179915021b0098ad8b2ae4d215c4f2acc8a28daafc5a7c7a

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