Malicious PDF — malware analysis report

Static analysis result for SHA-256 b185108e9973c937…

MALICIOUS

PDF

59.2 KB Created: 2020-11-10 18:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4d6fc92597e0fb0216c27e0471bc9619 SHA-1: 967933f5022a79431c12f4687fbe14df7436ab90 SHA-256: b185108e9973c93767f833f1cb748373caa9057925ac4f0bd5ded071b0315c8f
156 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 5

  • 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.
  • 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://traffking.ru/123?keyword=dividing+exponents+worksheet+kuta PDF link annotation
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/nolegona_gagoxazijomi_nunagutixafo.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/nixasasid_vikesuti_pamizunigodas_vujanebu.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/14667cd53.pdfIn PDF document text
    • https://jomunibudax.weebly.com/uploads/1/3/4/3/134342604/439c880d429d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9391eb-6ef4-4898-a17a-3cc04686dfaf/donna_donna_the_prima_donna_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da2f836-33ba-44a9-aa07-92f274021608/soxagat.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/votaluf.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/paradoxo_da_escolha.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/the_testament_of_joseph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b9d2cd-71d4-4b34-b3be-f17d9bcf61fb/4327416164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e2bae18-2616-47b2-b438-b382bf83adb4/16832243420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0aa64b7-79ba-4655-8c4a-3c1d8a93f80c/fuerza_como_vector_cartesiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc8e52b-6e85-4b8b-93b3-c84650fad1d9/ditonuxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ff9df6-2ef9-44d4-8712-1e35d8a185d8/nibamanenafixemaxosi.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

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_off0000aea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 5472 bytes
SHA-256: aa45fddda34b98550e969657f8e4b2b652528a3d9b72bbd10158252df69ae08e
font_01_sfnt_off0000c15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15A 9012 bytes
SHA-256: 90fa7bdd508e73cf1fa39274e7a6f5d0caf31a6a3b950c6b7b817c4d3f449244

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