Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f9802eaa4931e5…

MALICIOUS

PDF

78.0 KB Created: 2021-05-17 00:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c90bbcbd0d3ff5d9532307e08dabb06 SHA-1: 242553a6cebff0a06a0b56147f6944be163b678c SHA-256: 15f9802eaa4931e5a770b3cf6efe13efa3c4bfeaaaeaba2a9ca268e38d601b8e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Fallout 4 companions romance' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=fallout+4+companions+romance
    • http://phrensy.co/how_much_weight_can_a_15_hp_outboard_pushfnolq.pdf
    • https://kivogumit.weebly.com/uploads/1/3/1/0/131070776/3886762.pdf
    • http://jigitozunawada.66ghz.com/aggiornamento_android_10_huawei_mate_20_lite.pdf
    • http://tisiner.iblogger.org/ashapurna_devi_rachanabali.pdf
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/furopibodeb-fawasola.pdf
    • https://static.s123-cdn-static.com/uploads/4452171/normal_5ffe435aa2864.pdf
    • https://fewugoxozo.weebly.com/uploads/1/3/4/4/134441687/mejezer.pdf
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/riwatumokotone.pdf
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fe464f411b88.pdf
    • http://kukushpa.fun/mogefisigafubamddz0z.pdf
    • http://geosen.net/mailchimp_html_templates_freeboq87.pdf
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5fd746091a0cd.pdf
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/jevuzoretazaxevex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/10828859-677e-4eb6-8b06-673c7d88e386/gejumonutelatibasifa.pdf
    • https://s3.amazonaws.com/pajukovuxetu/finokiwunupa.pdf
    • http://jebowozuguvufot.rf.gd/soromiwosidarezuludezolot.pdf
    • http://velumosak.epizy.com/rebabogorixujajoxos.pdf
    • https://uploads.strikinglycdn.com/files/1816f189-c026-455e-a3f5-9a8cc429b71b/lista_de_elementos_de_la_tabla_peridica_en_ingls_y_espaol.pdf
    • https://s3.amazonaws.com/zugutixe/ugly_betty_episode_guide_season_4.pdf
    • https://s3.amazonaws.com/xofalepelala/laminate_sheets_for_paper.pdf
    • https://s3.amazonaws.com/dorobukasawituw/foxas.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_off0000f304.bin
d0a8d8b3e4636ee0d9727411eaeb33dbd688d6f026590e9f044725037bac3fec
pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 5124 bytes
font_01_sfnt_off00010463.bin
2fa0bb02b7d511843f34c437fc704f502ed417c03ce2bd952f794bb997dc8ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10463 11440 bytes