Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e0d0b7b2946eb7…

MALICIOUS

PDF

83.8 KB Created: 2021-06-09 19:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3692914732e3fa27f9a2cae85db03e3d SHA-1: cc1f73c1d1c3b7fe00b68eb341e6a6e297d5b975 SHA-256: f9e0d0b7b2946eb7a927be3ccbbe1bcfa7f135a10b4e808ad138ba14cabb093d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, appears to be a lure related to 'Greek gods family tree with pictures', likely to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://ketchas.ru/pbw?utm_term=greek+gods+family+tree+with+pictures PDF link annotation
    • https://rosafuzumago.weebly.com/uploads/1/3/1/8/131857847/cd9f964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410678/normal_5fdef1a61ad12.pdfIn PDF document text
    • https://zewelujipe.weebly.com/uploads/1/3/4/8/134846298/lobagukimenunos-bajiku-togabutes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_600fca714a3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454430/normal_60206eca3bbb1.pdfIn PDF document text
    • https://nusokusin.weebly.com/uploads/1/3/4/3/134350978/9156347.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/gogoxu.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/gimufepiw-didezexiduz-dumasikutij.pdfIn PDF document text
    • https://pobafegesodagiz.weebly.com/uploads/1/3/4/3/134305133/fakomurilidosifutab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_606b9e9f59287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_602ed9add475c.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/12914d5901c4dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e85a6a9-c7aa-45f6-9b33-d4831e87da8d/calculus_early_transcendentals_8th_edition_textbook_by_james_stewart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b26322-a08d-4308-a50b-62d22aac4301/pamivuwabobizizad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990b02f7-81cf-4606-8e2a-3a6f1174ecb7/what_are_the_channels_of_communication_explain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffed61f-0620-4731-9661-cca2ac38c3c5/how_to_start_warm_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e2e5be-f165-4412-9a4d-6d9264d0aa7a/60623811898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e603181-a086-4007-964d-2a599d412aed/unidad_2_etapa_1_cuaderno_mas_practica_answers_page_43.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144767292/bolijugurixakimekokoro.pdfIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144530112/employee_grievance_appeal_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be0f2a4-a949-4b23-b28c-d0c9d4bf2776/28753225151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1790b701-c884-46ad-ac28-2c401fdbb884/audio-technica_at-lp120-usb_direct-drive_professional_turntable_speakers.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/w/file/fetch/144775638/how_to_download_music_for_free_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1575a8-c22f-4bfc-b617-d46c89cb869a/sundara_kandam_book_in_english.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144518097/93139634987.pdfIn PDF document text
    • http://tugewuvog.pbworks.com/f/69_kg_in_stones_and_pounds_uk.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_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 5860 bytes
SHA-256: d6a513d36fb8162834b538aac28fb49f64f9e9ccc125967b43451f0b17bc3b3c
font_01_sfnt_off00011a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4D 11336 bytes
SHA-256: fd3f7eab178b5de89192dcafa4c42f8d66d1d6beb86f2ade9befca1f776d8f8d