Malicious PDF — malware analysis report

Static analysis result for SHA-256 d547d750b72820ea…

MALICIOUS

PDF

77.1 KB Created: 2021-04-29 11:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 983a491d1943afb8904a9542f76b7224 SHA-1: 4a9b537a85eec519ab343fd08b4569e9abd7828c SHA-256: d547d750b72820eaec4a7a008617237cfd7ade1f68e487959511404e1be3a11e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability for client execution. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of multiple URLs, including those on weebly.com and other suspicious domains, points towards a potential phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kuzutuzo.ru/strik?utm_term=dirk+gently%2527s+holistic+detective+agency+review PDF link annotation
    • http://probnik1313.tech/istenmeyen_davran_deitirme_plan_rneiie42x.pdfIn PDF document text
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/gumuleguxizine-pirupisogego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_5fd8afb33d260.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/fadasuregavosux-nodubuzisalur-widumimul.pdfIn PDF document text
    • https://mafalipakirufez.weebly.com/uploads/1/3/5/3/135347960/susozapapo-boroz-luvimasibukano-rufodis.pdfIn PDF document text
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/5579744.pdfIn PDF document text
    • http://rkconstructionsucks.com/baby_jogger_city_mini_gt_double_belly_bari5dl8.pdfIn PDF document text
    • http://salestore.pro/lerobotisiduv1xzez.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/benevaxu.pdfIn PDF document text
    • https://tumalurezap.weebly.com/uploads/1/3/2/6/132696080/zovomuru.pdfIn PDF document text
    • http://powerpoint4you.ru/how_to_find_the_magnitude_and_direction_of_a_forcefnvy9.pdfIn PDF document text
    • https://vemegerefawobe.weebly.com/uploads/1/3/2/6/132682093/ridibadonubalimu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_604f2d8fe7b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_605a9c86417a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_6018dc83b73d7.pdfIn PDF document text
    • https://kuwupixunipava.weebly.com/uploads/1/3/3/9/133986845/8016105.pdfIn PDF document text
    • http://carbackseat.site/80885217482yty2o.pdfIn PDF document text
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/tamuz.pdfIn PDF document text
    • https://bigikudas.weebly.com/uploads/1/3/0/7/130775628/c050c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_603b10aa11fd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/whats_better_2_stage_or_3_stage_snow_blower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eac37a2-2bfd-4f2f-8645-8744febe6c96/24381307772.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/steins_gate_0_route_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7f5575-4890-4df4-91c6-544d63b05c15/49880060619.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/1800_egyptian_cotton_sheets_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39070656-f478-432e-90cd-a64ffd127bf7/42302153089.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_off0000f019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 5552 bytes
SHA-256: 668f9b7192ff3920908de8bcf6fb0ae6da581931fe3cb9005e777ff42f05ca1d
font_01_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 10240 bytes
SHA-256: 76b1c7d51a7f7d8c6a74e26cb943aa10cd5a5521dc30c3ae80b1d5ec6e3fd35c

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