Malicious PDF — malware analysis report

Static analysis result for SHA-256 532853583fe6b08f…

MALICIOUS

PDF

80.8 KB Created: 2020-11-23 20:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ac88f3f1b722698dab4bceff4b8466ac SHA-1: de8f2e12912aad52dde33e7055b07818941cbaf5 SHA-256: 532853583fe6b08f636b542081f89346b45cb3edde11b0a27abad5493257ee7e
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 0.9998

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://trafffi.ru/strik?utm_term=the+chronicles+of+exandria+the+mighty+nein PDF link annotation
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/gejiwuxojuvezam-vawar-zasunum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f97941c316e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476943/normal_5fba605ddae52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f934aa4a17f3.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/vimisexe_nizatasofito_fuzevi_xujon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fabbe62becf6.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/tibomedub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fapaga/zisowudawe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/ruxuduwo.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/biradi.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/14766879837.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/the_authoritarian_personality.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/95887370816.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001091b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1091B 24616 bytes
SHA-256: 518287e49cabea23881078b4613c4a75497b52f5a200a7e3bcb63163a2ba9818
font_00_sfnt_off0000d0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F2 5556 bytes
SHA-256: 8f7a1d5e8e86993b34ca08d1811ba644445d12b6b9b19b1ac3a74733bbe2f85c
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 11392 bytes
SHA-256: 3d20f9c9a979a9694f8e805f3b53207deaebdca5346aeed2f3abb2948ebd1c80

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