Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbf467b584d1733…

MALICIOUS

PDF

86.3 KB Created: 2021-06-05 23:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e73a9a4c50f67085757251b1c4ed4014 SHA-1: e8d50a8be338b0500516cfdf10dff6ae60bd480a SHA-256: bcbf467b584d17334b663e9f68b4729a28dae0f9066df1e35f4d2b4f7b6d71aa
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Dragon Age Inquisition', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/pbw?utm_term=dragon+age+inquisition+early+rogue+build PDF link annotation
    • https://torififaw.weebly.com/uploads/1/3/4/6/134690130/pomesolonaxunevab.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/1fef173e9.pdfIn PDF document text
    • https://kofusozefo.weebly.com/uploads/1/3/4/5/134515267/nafimof.pdfIn PDF document text
    • https://zenunokiguwa.weebly.com/uploads/1/3/4/6/134614978/turimamubolakisexug.pdfIn PDF document text
    • https://rolawopu.weebly.com/uploads/1/3/4/3/134317168/mafamorulunepokakoko.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/lasamewix.pdfIn PDF document text
    • https://lotitarep.weebly.com/uploads/1/3/1/3/131383228/6ee4bd950ca.pdfIn PDF document text
    • https://toguxobuse.weebly.com/uploads/1/3/4/9/134902292/xavegegekosa.pdfIn PDF document text
    • https://betepojikimiji.weebly.com/uploads/1/3/0/8/130874485/3679184.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/e4928ad1-5e59-4715-be65-dd16b358e17a/vogojaguvazunetapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10042f08-c6c2-4f0e-bca7-2451b8bf7a77/tone_infinim_hbs-900.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/85607526386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a8f494-f48e-40c7-aa10-381c2e220c9b/47597729000.pdfIn PDF document text
    • http://fijinatuzut.pbworks.com/f/tujibunanosurulexaludaja.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144448146/1613333874.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144597447/vegan_meal_plan_for_female_bodybuilder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dec5f4e-17dd-4aa0-afc3-732097d090aa/ping_pong_chaos_unblocked_game_games_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be77c624-93b9-4914-b744-e69174a3b851/30863278074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05930889-3107-43b1-bf9c-65b9b3367e10/66258614692.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/42470822723.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144426900/ravaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930a4cb0-7bbb-4e54-b980-12160ebba4cb/32043878648.pdfIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/144485370/toyota_hilux_revo_2019_price_in_ethiopia.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/copper_wire_standard_wire_gauge_chart.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_off0001138d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138D 5360 bytes
SHA-256: 3c2dbf9a81f82ce96a4997ff9ceef87b7ba668f87e6848f51f8205c66de83bdb
font_01_sfnt_off000125d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D1 11128 bytes
SHA-256: e51fa00361d3820b0b80a04ca1afef456b505ceef54241e729017af8f81ca2c4