Malicious PDF — malware analysis report

Static analysis result for SHA-256 0066f6259594c693…

MALICIOUS

PDF

79.3 KB Created: 2021-04-06 19:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c9a81ce33039c3347a5677d36584ca5 SHA-1: 7f6c2ba31e3c3490e55a23f3f0aa2fe94140bea3 SHA-256: 0066f6259594c6939a5d5492e09c43b1f6c359be93efe4b6862543ee5a48db72
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to recipes, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=pampered+chef+brownie+pan+recipes+egg
    • http://discount50it.pro/dovasijosjtn9.pdf
    • http://goromeo.club/la_santa_biblia_catolicazyq3h.pdf
    • http://znakomstva69.space/how_much_for_a_bale_of_pine_straweuo88.pdf
    • http://igonlinesupport.com/41837563494qy3qd.pdf
    • http://bobr.space/43544378282op7xk.pdf
    • https://static.s123-cdn-static.com/uploads/4369174/normal_6006a3d8b04f6.pdf
    • http://100naturals.fun/is_primal_kitchen_dressing_ketoglm7e.pdf
    • https://cdn-cms.f-static.net/uploads/4480585/normal_6043129c7a71c.pdf
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6023bc5b2f537.pdf
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5ff79e082856c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tomaxade/adivasi_film_video_songs.pdf
    • https://s3.amazonaws.com/zeworibuzoza/92757126965.pdf
    • https://s3.amazonaws.com/davolazupivowi/wodoguwixujeronabelobof.pdf
    • https://uploads.strikinglycdn.com/files/fac942a6-f897-4e39-8b38-ed45c6a96385/what_size_tires_does_a_2010_ford_escape_have.pdf
    • https://84bc2af4-305a-40b7-847c-8c52cb6b08d2.filesusr.com/ugd/a2e525_9f95c9fb83c146b2a9a985912476cd68.pdf?index=true
    • https://uploads.strikinglycdn.com/files/34da1f78-6c7d-4043-8b4b-21391a7bd94e/ripogekaliwutilenofatar.pdf
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_faa9c4bbe4c144569570ea82adfa3f24.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9fe85d47-594f-484d-bea8-fc23b304d0a4/20368101307.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39c.bin
f6f37cfd8aacd666e3a12cc61a65c976c39576979e122911a620a29da9c94cc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 5772 bytes
font_01_sfnt_off00010723.bin
1cca992bfb6d5753a9358d5d2bf5ef2567323b14f4e43c649397c03866bd052b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 12100 bytes