Malicious PDF — malware analysis report

Static analysis result for SHA-256 056aced07f705ff4…

MALICIOUS

PDF

73.5 KB Created: 2020-11-18 19:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed14973b6d852e580f2b7ffb44edd24c SHA-1: 5d3639b9c4c1700c4c7eb2eca478ca1d35be895a SHA-256: 056aced07f705ff475ffa59125dc5854763dd095568f5bb08a6a4bed178dc7e3
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=psycho+pdf+bangla PDF link annotation
    • https://luzodogapop.weebly.com/uploads/1/3/4/2/134265842/1647323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_5fa67ad1983d5.pdfIn PDF document text
    • https://voleruzogiz.weebly.com/uploads/1/3/4/6/134696629/6698816.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/jezaxojipevu/37701880392.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/55610185387.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/45946638324.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/42871429273.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/pufegipurabaxiziboluwadup.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/zatitarupekezunib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67512167-ea37-4e9d-9c0e-d21d5c4f43f2/age_of_the_rebellion.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/adam_taurus_rwby_fanfiction.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A6 5108 bytes
SHA-256: d25f9cf6ceb1b48ff8b2d830de050f13c6845c5679bc5bedf8893e3dfc3a7ceb
font_01_sfnt_off0000c5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EF 10040 bytes
SHA-256: e3fdb2bb4499b54caf4729739a17404864e0f52cb6b911f3177ebe863eb69683
font_02_sfnt_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 11568 bytes
SHA-256: e76888afb8aca09c07170fc5dcbdd773f1a31e4d8b400d6e78b940403383482b
font_03_sfnt_off00010b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B53 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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