Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc76342de88d1a0d…

MALICIOUS

PDF

69.1 KB Created: 2021-03-08 15:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f0c047acfdf4ac19a23f3ac376ffb188 SHA-1: 51d64fe747e5a306b33bb2743cb8244aa76a135d SHA-256: bc76342de88d1a0d28bcf68787fa7d89d968713f6c884507e566cd5236a9768d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=landice+l7+service+manual PDF link annotation
    • https://kobuvedubi.weebly.com/uploads/1/3/4/0/134017802/96049bcb064c9e.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/gfhiIjf/kuzerixifoxukezerob.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/jdihpgd/nasa_federal_credit_union_phone_number.pdfIn PDF document text
    • https://semebikifotiz.weebly.com/uploads/1/3/4/7/134752265/9749759.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/Ugifbje/download_backyard_baseball_2001_for_scummvm.pdfIn PDF document text
    • https://cdn.sqhk.co/nabowixufori/jgSg4xL/bear_approach_bow_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/40pjgVV/zugezamugifusax.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/hcifibN/razaluzadibok.pdfIn PDF document text
    • https://pusenosate.weebly.com/uploads/1/3/5/3/135347115/fomiverida.pdfIn PDF document text
    • https://cdn.sqhk.co/vegupujed/jjhjdCV/bekhayali_video_song_bestwap.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/53311334466.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/2301543.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/DilGIjj/free_robux_codes_2020_no_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/gdHCvgh/police_scanner_chicago.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/wapilavuxes-tiriradu-nagidubatajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujunutab.atwebpages.com/dulokamajosomapasevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e9961d-f02a-4b8a-9f62-cb0b0241e134/12103724274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344dc8a1-3d9f-4024-a82b-01bbabaf51f7/nikon_d40x_dslr_camera_review.pdfIn PDF document text
    • http://gafopoxekog.epizy.com/o_c_meaning_call_sheet.pdfIn PDF document text
    • http://xegilejefaga.epizy.com/59419300672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d882a6dc-1737-48df-ae74-9d2ce0cbe2cc/insignia_24_inch_tv_dvd_combo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c664019d-8a33-41be-b9b7-f69c48936a5e/18890989783.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_off0000d12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12C 5164 bytes
SHA-256: 0d5a7b636719ab41c13636f31acddd8c133d702021d565ee0787831d7b5cb98a
font_01_sfnt_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 10120 bytes
SHA-256: 1b9591a20a6167fa46a23e7ee59781f8be111b2593aa12955658da9eeeaf0d41

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