Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5be58f74e874ba5…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 04:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cde7481d4a3801396467ccd4de984f58 SHA-1: 5f109a971b0a92ff0abb97488002fcdde23a19db SHA-256: c5be58f74e874ba55cf167b56932abef527b52ac647887e78b94a13c13bc6c5d
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 0.9998

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://ponafet.ru/wix?keyword=which+word+means+pertaining+to+the+heart PDF link annotation
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/xaverulikul_diwalov_vokumomegizewu.pdfIn PDF document text
    • https://fumewalifo.weebly.com/uploads/1/3/4/8/134884483/6725126.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/2725874.pdfIn PDF document text
    • https://supogile.weebly.com/uploads/1/3/1/6/131606666/cbb11cd08577e.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/2762951.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/5457153.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/96686301224.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/ebc18142414.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/jijd1ig/77019091568.pdfIn PDF document text
    • http://mibotirekusiw.mywebcommunity.org/norobifopuxudogor.pdfIn PDF document text
    • https://kujedoduzenawo.weebly.com/uploads/1/3/0/7/130776750/xapeve.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/dhjbRhe/kalender_2021.pdfIn PDF document text
    • http://zisezamerares.mygamesonline.org/osteoporosis_tratamiento_natural.pdfIn PDF document text
    • https://cdn.sqhk.co/vigomuraguf/ixigIji/wikuwejuwamogudodubez.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/is_gazelle_exercise_machine_a_good_workout.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_3c1af3b8956d412f802b04c9636f2129.pdf?index=trueIn PDF document text
    • http://xowobovu.myartsonline.com/best_kitchen_stand_mixer_2020.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_1e0b611ba1d84c149697bb1433a6e660.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_28c96d52c9f94436a065802e1113ccbd.pdf?index=trueIn PDF document text
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_116e697b15f54578af936002c77c4a33.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 5560 bytes
SHA-256: 924ac2741696976f990da96001b21baa45f2b9597deb63dfbb392eb88bf6b1d9
font_01_sfnt_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 10248 bytes
SHA-256: 762a21e6576b3f1ffbb0ee1dec52314fcbafba4e0a12ef20d5a5c23662ef156e

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