Malicious PDF — malware analysis report

Static analysis result for SHA-256 884fd149d39bca70…

MALICIOUS

PDF

77.3 KB Created: 2021-03-20 20:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 24bd8e5a3bafb49ff9e0e9cf8bf332ce SHA-1: c4bcf6db696ac3f9647589caab8141aae3e7e0fb SHA-256: 884fd149d39bca70b2a7829fafd36b9c16c7fe78f06896cd7736e2d5c94b071f
186 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, many of which point to disposable domains or are used in a link farm configuration. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing or trojan variant. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to potentially harmful sites, aligning with a phishing or SEO-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/123?utm_term=the+neverending+story+song PDF link annotation
    • https://sepafolelobonel.weebly.com/uploads/1/3/4/6/134614676/5967311.pdfIn PDF document text
    • http://raisinshq.club/general_ledger_chart_of_accounts_templateyhumi.pdfIn PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/dowugemi.pdfIn PDF document text
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/wivevokoxix_bixale_zetovubamun.pdfIn PDF document text
    • https://xajapimiwumorav.weebly.com/uploads/1/3/0/7/130739235/80520d834524.pdfIn PDF document text
    • http://discovljzg.fun/aluminium_partition_wall1ack7.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/luwamosudenabupivex.pdfIn PDF document text
    • https://gixajime.weebly.com/uploads/1/3/4/7/134745735/54b4cc0218f.pdfIn PDF document text
    • https://bikepudebap.weebly.com/uploads/1/3/1/4/131405977/bac134.pdfIn PDF document text
    • https://kanapefa.weebly.com/uploads/1/3/2/7/132740413/guzeb.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/9526631f-5a22-45a5-9477-0ebd7eb2ff54/how_the_grinch_stole_christmas_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2f85e7-4a8a-4cf2-bd26-cd88de510f77/dodge_caliber_cvt_transmission_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f4666e-1933-4d6a-99f5-89567c8eaf2d/who_wrote_12_days_of_christmas_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40667ae-d64e-421e-91d4-105f6095383b/turnigy_9xr_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1242ba2e-e03c-43c4-a110-0955e2b3e110/tuwuroxepobobipupak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7464253-ae93-4593-a511-b0372e3569f1/is_per_capita_income_monthly_or_yearly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6192bb4b-5864-4618-8cb0-f135fb76a556/logitech_harmony_ultimate_one_plus_hub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9c813d-9a17-4b82-88a9-597b4622fb4b/frigidaire_portable_retro_12-can_mini_fridge_efmis462_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b834d9-e3f1-4294-bba0-b7af9f25ece8/what_is_a_synonym_for_conscience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3034f7fb-cf33-43ba-a234-28e9c339459a/6393391669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e201b8a5-ea6f-4b81-be11-c44ca0b06680/timaeus_and_critias_yugioh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f35202c-4479-4538-a880-c476ca2944ba/dorian_gray_exterior_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4372c6-33ea-47a8-b037-2a9cd9a742cb/parufib.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_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 4956 bytes
SHA-256: a919fa3e1a8f927ba3ff3053526788d04321faa88c693610a8f9f7f5041d2c54
font_01_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 10896 bytes
SHA-256: 5e5e782eb95cd97826a02cd77e7f6f5c76f94ace19dfef6d5029d0475b4a9ddc

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