Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e253452eb2f787…

MALICIOUS

PDF

79.7 KB Created: 2021-06-14 06:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9f6edaf6a48590c490993640a31401 SHA-1: 6886570e8763385c0891dcd880d7a800fa2167f7 SHA-256: 66e253452eb2f78752c1dbe07d0e70fda6629ae1ecd6d29ce55189e705dc59bf
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The SE_CALLBACK_LURE heuristic further supports a phishing or scam pretext. While no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/pbw?utm_term=hello+guest+alpha+2
    • https://xumogaveranowiw.weebly.com/uploads/1/3/4/3/134371782/pofubopituso.pdf
    • https://cdn-cms.f-static.net/uploads/4474739/normal_6048cc2820948.pdf
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/2382745.pdf
    • https://cdn-cms.f-static.net/uploads/4383922/normal_60bd6f6524242.pdf
    • https://cdn-cms.f-static.net/uploads/4492600/normal_603a0421d423d.pdf
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/4908048.pdf
    • https://pusugokejetajek.weebly.com/uploads/1/3/4/7/134765622/legeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d6625d6b-7d05-479e-b996-c9d7b5d957ef/24637435269.pdf
    • https://uploads.strikinglycdn.com/files/9f9764a9-f0a3-4fdb-870b-c17136017970/los_caballeros_del_zodiaco_las_12_casas_saga_completa_en_espaol_hd.pdf
    • https://uploads.strikinglycdn.com/files/698ed711-31bc-49ee-9ffb-1ef9bf2602de/faxonopozaxalov.pdf
    • http://vuxoris.pbworks.com/w/file/fetch/144844293/ejercicios_resueltos_de_divisor_de_tension_y_corriente.pdf
    • http://bovozajezo.pbworks.com/w/file/fetch/144694347/how_to_charge_phone_with_power_bank.pdf
    • https://uploads.strikinglycdn.com/files/d252a764-21c2-4489-806f-59cc905bfedd/96522193435.pdf
    • http://lifuzopa.pbworks.com/f/sonic_flash_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/893fb182-c65b-4369-ba99-b2aff1f2fefd/icivics_limiting_government_worksheet_p.2_answers.pdf
    • https://uploads.strikinglycdn.com/files/96612a1b-81bb-4966-b715-e47e96efd9d1/multiplicacion_de_2_cifras_con_la_prueba_del_9.pdf
    • http://tagexoba.pbworks.com/w/file/fetch/144423375/19863332559.pdf
    • https://uploads.strikinglycdn.com/files/dbee4253-abf0-4ea2-974f-ddb8a49333dd/zasukozez.pdf
    • https://uploads.strikinglycdn.com/files/fc444e82-a91c-453c-8a10-f9a279f65f33/86482247003.pdf
    • https://uploads.strikinglycdn.com/files/7164ce86-81e4-4e6f-9b3e-2e343f1bab40/9049143365.pdf
    • https://uploads.strikinglycdn.com/files/433880de-0bed-4e8c-8bfa-1fe3bfd4453a/craftsman_professional_radial_arm_saw_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/ea33d3d0-5227-4537-b57e-1d216c111035/glencoe_biology_mcgraw-hill.pdf
    • https://uploads.strikinglycdn.com/files/bfb57dcf-fb53-4be2-9e7a-4bbf6f20a14f/catch_me_if_you_can_musical_soundtrack.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_off0000f5df.bin
c54b1ba5372934008c7ef9d3f42cbe0d5bab33d8e923fbc49517eb1db7b88e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 5076 bytes
font_01_sfnt_off0001072b.bin
0985e9e1528d9286463a75a14c463fe745ce9f0ab70384338514057811398bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 13432 bytes

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