Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37e06b5d885f151…

MALICIOUS

PDF

73.8 KB Created: 2021-06-05 22:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 703f181a8713b3c0e29ff5f6d1b48364 SHA-1: 22324ff7ef9340571428c967ac53ccaea2e10cfe SHA-256: d37e06b5d885f151b5bc15fb0b902a4fc3c48b55b63a767d5fed7a4d82845031
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to translating PDF documents. The presence of numerous external URIs, with one pointing to 'garglob.ru', strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://garglob.ru/pbw?utm_term=como+traduzir+um+livro+em+pdf+de+ingles+para+portugues PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144573708/key_quotes_in_macbeth_act_5_scene_2.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144559374/silverzone_maths_olympiad_sample_papers_for_class_3.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/w/file/fetch/144627945/8173353376.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/8233121707.pdfIn PDF document text
    • http://silasofinat.pbworks.com/w/file/fetch/144443190/rifawegezakebazokiribura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7464c2-127f-41fa-abb2-894ee6421917/bubopebavo.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/f/2020_kitchen_design_v11_crack.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/xogobopibunanalawuderotit.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144469539/a_to_z_bengali_old_movie_mp3_songs_free_download.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/144508830/82518588935.pdfIn PDF document text
    • http://pudamalulera.pbworks.com/w/file/fetch/144556881/megugeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a7b2d5-49f0-448f-b411-cce111fa835e/mechanical_engineering_degree_salary.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/26199662437.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144463500/how_to_put_maytag_neptune_washer_in_diagnostic_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96cc2ca-4c78-4135-a9d1-95fa02bb9e2f/lepamarilewepeliwosize.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_off0000e013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 5376 bytes
SHA-256: 7e652f9b290de4ff080bf5340f2f81144b824b1c21bec0b9867a1b061cfc12b9
font_01_sfnt_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 12232 bytes
SHA-256: 98f2df9a6e278f49a32ad097eb418836bab4ce8a059bca7c5ed02f03533b8674

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