Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb17461ef1f6820…

MALICIOUS

PDF

71.5 KB Created: 2021-04-06 11:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ec7b554c7e3e9e5a1eb0326fa9c88c8b SHA-1: 04af629779845522c0e29f3ea215dfc7baf62049 SHA-256: 3eb17461ef1f68209274aa8906c6bace0a56a2088ea4995b2cfb9196da5ad87c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'book of enoch', likely a pretext to drive traffic to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=who+are+the+watchers+in+book+of+enoch PDF link annotation
    • http://card2card.live/how_to_charge_compressorlyuxf.pdfIn PDF document text
    • http://gunekagafa.22web.org/puronitesile.pdfIn PDF document text
    • http://sayseedokg.com/mupasuvekanigusajili7doft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451575/normal_603fe8fdc3f0b.pdfIn PDF document text
    • https://bosofivi.weebly.com/uploads/1/3/4/6/134668799/gorokavusi_zilijev.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/17a842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_603445432fc66.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/8418275.pdfIn PDF document text
    • http://repair-monokoles.ru/retro_video_game_monthly_boxgdai9.pdfIn PDF document text
    • http://jejidizifobimir.iblogger.org/dalolotepagatiwegozipes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369640/normal_5fde4a166ee95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_4c6a99efd28d401aa04d38a5dfa3adc3.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_8ff9b8cb6e6d44deb0760deb4170a957.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb0025c-8f99-4680-a058-d4324188ee67/delonghi_ew7707cm_safe_heat_manual.pdfIn PDF document text
    • http://jitoritobo.epizy.com/36438413048.pdfIn PDF document text
    • http://vukixom.epizy.com/technology_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50314fe-2f1f-4100-acef-47d33695b24b/yamaha_01v96i_usb_midi_driver.pdfIn PDF document text
    • http://kirimogopagi.rf.gd/fudovawijukedilatipiv.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_2c5ed793591142b09476937e8e1274f6.pdf?index=trueIn 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_off0000daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 5244 bytes
SHA-256: 17d99698ccd5398d7134380e8f9930968c7f8948999b5f2f9bbdbbe58d87e8a3
font_01_sfnt_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 10404 bytes
SHA-256: b7b755b434eab22a35718336c65eb3fbc4d6ff6b13e205af5ad81041f1c50369

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