Malicious PDF — malware analysis report

Static analysis result for SHA-256 92970bfe15c96b9b…

MALICIOUS

PDF

84.8 KB Created: 2021-06-09 17:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc76b2f77d673d0657f5c61c1c485bf SHA-1: 6c9dcba68dd39a55bc76a3ce7792208c9130cbaf SHA-256: 92970bfe15c96b9b001d4b65333b019ebabcc690c1a6133b06af50580483d7dc
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to manipulate search engine results. It also contains an embedded URL pointing to 'garglob.ru', which is likely malicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=vidmate+download+2018+ka
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/16c6e1193e3f2.pdf
    • https://bejutenexej.weebly.com/uploads/1/3/3/9/133997629/didogekenatiluto.pdf
    • https://nofuzuvovakiba.weebly.com/uploads/1/3/1/3/131379181/makoziraraniw.pdf
    • https://tavutapakewig.weebly.com/uploads/1/3/5/3/135399939/2c42a9a4966fdee.pdf
    • https://waretopaze.weebly.com/uploads/1/3/4/5/134529701/nuwodalolu.pdf
    • https://wajirabipuxu.weebly.com/uploads/1/3/0/8/130874591/6644272.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/637aa0c3-b813-43d0-9462-65e1926dfbf6/brother_xr9500prw_computerized_sewing_and_quilting_machine.pdf
    • https://uploads.strikinglycdn.com/files/a3ab7d01-a888-4166-8a42-5751e591ebb4/9.snf_tarih_soru_bankas_indir.pdf
    • https://uploads.strikinglycdn.com/files/b2231506-45ab-4b43-bb8d-9fc140a223c5/kukixubasufajadamolibe.pdf
    • https://uploads.strikinglycdn.com/files/6f2fee3f-a788-4d4d-af01-0b504b3930e9/7036405778.pdf
    • https://uploads.strikinglycdn.com/files/604eb0a0-c77d-461c-a916-70fb9a553f06/why_is_the_aux_not_working.pdf
    • https://uploads.strikinglycdn.com/files/dec1b20b-de7c-4922-a1a4-fa32a6ffeef1/41339569267.pdf
    • https://uploads.strikinglycdn.com/files/fc103463-5bad-4004-94a8-97e2da65f391/logavudakedize.pdf
    • https://uploads.strikinglycdn.com/files/7e8af77b-92bb-4557-a9aa-fc5687df0d32/navien_hot_water_heater_service.pdf
    • https://uploads.strikinglycdn.com/files/2977a26e-369e-4d0e-bf3d-73a0d44f41bb/muburawivirurodewofiziw.pdf
    • https://uploads.strikinglycdn.com/files/99a2dc23-9dd2-46a3-83e1-b6e7149dbec1/ezgo_txt_service_kit.pdf
    • https://uploads.strikinglycdn.com/files/ee459da8-fae4-4984-9c4a-ef888412aa62/dozazujinenojixugus.pdf
    • https://uploads.strikinglycdn.com/files/2df83ab3-2c39-4b88-9c5c-b4eb38ec1dfe/tp-link_tl-wr703n_dd-wrt.pdf
    • https://uploads.strikinglycdn.com/files/4eb81a6a-7220-400c-afaf-b47ac8306479/how_to_turn_flash_on_sony_cyber_shot_dsc-h300.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f47.bin
6835d8a3e6e5ee35698b4968880ff30a812bad4627c01eb8595e55439d1404e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 5340 bytes
font_01_sfnt_off00012178.bin
8d40d5b836b1bfdb42accda1869c34f8c6bcbf3a35f230219aa36389da5d33e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12178 10852 bytes

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