Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc25291fba6024b…

MALICIOUS

PDF

64.2 KB Created: 2020-11-18 14:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1f8cd0a342fafa63da42993a518a754b SHA-1: dd234e73f688253b8b3f31d4de2b6d9453df295d SHA-256: 0bc25291fba6024b50aea79f86abab2cae9a4cc326daae2a3448098e7ea657ce
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating it hosts numerous external links. One of these links, 'https://trafffe.ru/aws?utm_term=lagu+123+em+yeu+anh', is flagged as unknown reputation and is likely the primary malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

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://trafffe.ru/aws?utm_term=lagu+123+em+yeu+anh PDF link annotation
    • https://xolisibi.weebly.com/uploads/1/3/4/4/134462635/bevedo.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/c70d172b-6516-47f0-bafc-73822069c944/reramamutegojiferalana.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/automatic_call_recorder_pro_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/the_illusion_of_life_disney_animation_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bidejonixom/58379515690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae405622-ef85-40a7-8f3d-17f62c58896d/nezenuzekivo.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/woleriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36cf7bfb-8778-45d9-8d76-be0d1001076e/girl_scout_brownie_song_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/dnd_city_map_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/xajizumarolurokogis.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/43804560009.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/56681521722.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/49128891224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f699859e-41f5-4109-aa4c-2e8c94cd1cf7/wifam.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/taquizas_elteco_street_tacos.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/53967704060.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_off0000b7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E0 5184 bytes
SHA-256: 881928e9f71f875971ed5743afe8d59b35467b290b2a48d1d0c9b4ba178fa836
font_01_sfnt_off0000c979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 14484 bytes
SHA-256: da0b6cfee2ebe14737411c4493a9ac486528dce62900ba268bf837fad6f489fa

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