Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd133f449af68778…

MALICIOUS

PDF

77.4 KB Created: 2020-11-10 19:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d464282b4e9d32f293d7a926cda4a8b0 SHA-1: df7f964b571de499bc6bd998e30c36a0934ebfc5 SHA-256: dd133f449af68778ae27025c2e9a1e318d1b87a336b674332ba9547670a2e697
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=list+of+trig+identities+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fa3100cb5be1.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/fetovobez.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/kegovotaz-liwadonemuzopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5fa68829d5d85.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/fbb42.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/96d77a9e-65a9-47d5-91c0-b1f822a475dc/sixaxis_no_root_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/76863288961.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/sukaduvomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be2236d-338b-4e85-b227-27c8e50635ae/charlie_chaplin_speech_great_dictator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52570a49-ebcb-40cb-9545-e6ad4b36b628/temogebunome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f963be-b06a-4365-9f98-07ea8579e969/mozepelofatinavedorofev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31adb1bb-85dc-4340-9632-8579534a4098/ligomazobagetojivivaxig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40c8fb6-4632-4e25-8f44-c0037dc82b06/windows_7_ultimate_key_2020.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
font_00_sfnt_off0000d68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68B 4908 bytes
SHA-256: 01f2fb8644c6e0da9c47ce7e2a6e94052c9f059fcca7a18587e79bc88fbf70c7
font_01_sfnt_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 13392 bytes
SHA-256: 8a14ba0a7212aec54358da744734e605d17425696cfc7e977921bebf488bdd10
font_02_sfnt_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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