Malicious PDF — malware analysis report

Static analysis result for SHA-256 7960dd6392588317…

MALICIOUS

PDF

81.1 KB Created: 2021-03-28 19:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dc2db712ad759dda4d2fd0efbfa45f70 SHA-1: 1c0f6ae9c56495730b8b43ae09b9936d74a2b12e SHA-256: 7960dd63925883175180733153c538af7509f63bfdcdc8861c04c175ecb8bc9c
186 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to a map search.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=mapa+de+aguascalientes+con+nombres+pdf PDF link annotation
    • https://cdn.sqhk.co/vukixukafoga/Lqjegfi/88496926286.pdfIn PDF document text
    • http://centerbluebadge.com/computer_hardware_engineer_job_outlook_canadagas2x.pdfIn PDF document text
    • http://mon-cmbretagne.com/logitech_g_saitek_x52_pro_flight_control_system8da6d.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/ce3qE73/csdcas_letters_of_recommendation.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/jh2idKK/twisted_tea_light_alcohol_content.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/ajgcLhe/61378701574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_5fe93d05707cc.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/UhdjcAj/70374839436.pdfIn PDF document text
    • https://cdn.sqhk.co/fotutubujuf/dGjiNgg/employee_injury_report_form_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fe3031971d54.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/lsidhjc/xavekizu.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/hicZjhD/pocket_frogs_promotional_breeds.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/zQgchdl/marine_weather_forecast_freeport_ny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_53e688d5b54b45fa845b1a4725537edb.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_2bfb2813c08749b0aa25e47efd471a19.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_9c9438b683434b8bb751ab4d9db6f315.pdf?index=trueIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_e2e34612395142609e38842cdc941000.pdf?index=trueIn PDF document text
    • https://c92c3cbd-aa1a-4a47-9f3e-f582eeca1925.filesusr.com/ugd/89b1bc_7573914a1085476eaef3017c3354fd88.pdf?index=trueIn PDF document text
    • https://b5f62e6e-b620-4b0e-90dd-fa81fc7fb5c2.filesusr.com/ugd/18d815_0e920ae6e1d9484081b9959702ff9c90.pdf?index=trueIn PDF document text
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_9d86e5be2484421bac08dadc6d636225.pdf?index=trueIn 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_off0000fd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 5620 bytes
SHA-256: f4caa4626456efe3e28850bd81d311927835bfa12ba414554eef31c787709134
font_01_sfnt_off00011067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 12028 bytes
SHA-256: 687a453a97163b6af8cbdb1db5c361b30959e15cc6dc328e06540bcbc290603f