Malicious PDF — malware analysis report

Static analysis result for SHA-256 78494cda99e05edf…

MALICIOUS

PDF

96.6 KB Created: 2021-05-14 20:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ed67ec7604f4011addf3d14f639c698 SHA-1: aabd3893b5240160dfe4d97d89ab4008c451f8b6 SHA-256: 78494cda99e05edf26b041569335fba8f1e08850b43f91a781097c1d2353dda5
186 Risk Score

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 0.9991

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://golowaki.ru/strik?utm_term=fate+rpg+skills PDF link annotation
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/4111783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_6015af8aa3010.pdfIn PDF document text
    • https://tetobalowuw.weebly.com/uploads/1/3/4/5/134523757/petakob.pdfIn PDF document text
    • http://idealica-italiaoficial.site/39157959166a0nep.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/o9Lemgv/ielts_listening_with_transcript_and_answers.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/1624647.pdfIn PDF document text
    • https://xaredoluvowa.weebly.com/uploads/1/3/1/8/131871785/6807865.pdfIn PDF document text
    • http://freshka.fun/juwomobinazklhjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_6017a2c407607.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/hggehhO/cengage_maths_dpp.pdfIn PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/3557128.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/miniwubipozuju.pdfIn PDF document text
    • https://cdn.sqhk.co/ragekasa/Mic1Aia/chevy_stepside_truck_bed_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_5fd99180cd4f5.pdfIn PDF document text
    • http://golden-charm.ru/1037553764888jc.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/igb9xhr/tractor_pull_sled.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/Zigl5Wm/famous_news_reporters_australia.pdfIn PDF document text
    • http://it50save.info/rutuxedodabopobokevapobe7q2bz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393362/normal_5fefb7e96710b.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/c8837c3e2b.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/zexaxujuzufimofikugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_7916b2a1095e408c88174847137e4a40.pdf?index=trueIn PDF document text
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_5e2737697975471e868bd24e1967bde8.pdf?index=trueIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_52d50fed973e45caad10bc455ab023ab.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_d6843ca0a9834b2e82796e91bc7b7381.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_off00013c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1B 5004 bytes
SHA-256: 7ee2a0667a4f69736663814179882397b0c8a06137b81044d4a531797a89e738
font_01_sfnt_off00014d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D39 11240 bytes
SHA-256: 49bbe3d32c567723ae96873b4f9e0ce4ed1d7c99129fc781507f5d409295266e