Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f76c68c4158b551…

MALICIOUS

PDF

67.5 KB Created: 2020-11-10 12:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4805e412ceeb9c25e3485d8c4b95a4ba SHA-1: dbea0ab45ef87a5abe02b9fe6ea4928bc86876e9 SHA-256: 9f76c68c4158b551661bf9eeaa1e8e967ffdfb5ee3fb717e4e3cecf584d28e1e
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://traffking.ru/123?keyword=rome+and+the+rise+of+christianity+worksheet PDF link annotation
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/zudejoviri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460476/normal_5fa995589f70a.pdfIn PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/8fdf33e75e2ba2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kofabube/zamujeriledotodenunov.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/64648474770.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/make_a_wish_costumes_for_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/pudigebeki.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/81574981338.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/zamuxabizokopebo.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/doctor_who_missy.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/5715355874.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/va_net_tangible_benefit_worksheet_irrrl.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/kedimokexenefifijofobab.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/wumibonekixipivumiz.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE62 5280 bytes
SHA-256: 1880016c05fc8b8fa0068df0e5ac88a6f6008ea7b93a674a360b1957837cf01d
font_01_sfnt_off0000d03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03C 10212 bytes
SHA-256: 8d6fe24eaa322c709ce93752dc0ac6f6b583fd29fa4e81d0ecf8b2502dd74b3f
font_02_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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