Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d640e91021457d1…

MALICIOUS

PDF

79.7 KB Created: 2020-11-24 09:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0fdc87662cca31feb219fd653276b3d7 SHA-1: 230e5d08096a086a6eb343163cdf2e27a5edbb4d SHA-256: 3d640e91021457d1ceadc06810122a701186f7e33b96a4510acc53d413a8d697
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 0.9997

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://traffnew.ru/123?utm_term=the+great+gatsby+chapter+8+summary+cliffsnotes PDF link annotation
    • https://jolezutixuzusav.weebly.com/uploads/1/3/4/6/134605000/rajovosuni_jobobofi_pesabuvopovit.pdfIn PDF document text
    • https://sonuboguf.weebly.com/uploads/1/3/4/3/134310015/balox.pdfIn PDF document text
    • https://zowutopukanujim.weebly.com/uploads/1/3/4/2/134235103/8464695.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/vabasitogenixubuf.pdfIn PDF document text
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/sumofuxapolimef_viziz.pdfIn PDF document text
    • https://kozipizifepawu.weebly.com/uploads/1/3/4/6/134631686/3044507.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/bipagim.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/tekujel/myanmar_mp3_net.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f3f105-d63f-4df9-b055-47669e61ca00/24254874013.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/82739359552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59de0bfb-9365-4b38-b32c-dee77d27b85e/49600165276.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/97832153435.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/xivazavunefedudowuvalefir.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_off0000faa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA5 5812 bytes
SHA-256: a177ec164851a2fd14b102c4e31170cc3b7045254c37dbdc4b3bd016f5a361f7
font_01_sfnt_off00010e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E51 10480 bytes
SHA-256: f2176f5a05eaaf77903831ae674b18bca420cd0568ff5710a5a5f7cc4be1c874

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