Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f155f6a48a74000…

MALICIOUS

PDF

80.2 KB Created: 2021-02-22 23:34:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed4bbce61a7cc2ea29e76cd0de691b96 SHA-1: b0f1d1d02bc4db6fdbd4548ad8a0d7300d11896e SHA-256: 6f155f6a48a74000d9cae09d81565b23529adb0e9b44b16635c09f98ce0528c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. ClamAV detection and ML classification confirm its malicious nature, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the presence of embedded URIs and the nature of the link farm indicate a phishing or malicious redirection attack.

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://leonvi.ru/123?utm_term=old+school+runescape+free+to+play PDF link annotation
    • https://cdn.sqhk.co/kogoruzojif/idjZwgf/xurababivoxoluvaboduduvav.pdfIn PDF document text
    • https://minajekefejuwow.weebly.com/uploads/1/3/0/7/130776819/xomusuvu.pdfIn PDF document text
    • https://jabevemejo.weebly.com/uploads/1/3/1/4/131483275/kirivaras.pdfIn PDF document text
    • http://pezamuxajezupe.iblogger.org/15827745260.pdfIn PDF document text
    • https://zemojedi.weebly.com/uploads/1/3/5/3/135333580/bopozoferufima-taletigopa-wazajojob-tifababuzimubox.pdfIn PDF document text
    • https://ragivigelogupow.weebly.com/uploads/1/3/4/5/134525503/mipalexapojolupovom.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/dhdijgi/rudukesutafajezaxifawaf.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/my_talking_tom_cat_2_free.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/getizar/pukuverubiberu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/i_drive_safely_final_exam_answers_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/a_monster_calls_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/hitchhikers_guide_to_the_galaxy_quotes_42.pdfIn PDF document text
    • http://wubalele.rf.gd/68089382888.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/xewedixifuwawa.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/32476099928.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/chin_tranh_v_ha_bnh.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 5372 bytes
SHA-256: 8f28a4841746d545eba1225b016db0de3c9871373a5f7199e7244cacd9a859ee
font_01_sfnt_off00010dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 11196 bytes
SHA-256: 94d1574f5e9129ef569cc887a03c08f770ddda424aeeed268a69ef791cc457d1

Open this report in the interactive analyzer, or submit your own file for analysis.