Malicious PDF — malware analysis report

Static analysis result for SHA-256 968c1e959cad279b…

MALICIOUS

PDF

86.5 KB Created: 2021-04-02 15:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959053cbc4085153347de24c995cd4e2 SHA-1: 791395de7ea0fe239bd7083f36a3c296662ce8d7 SHA-256: 968c1e959cad279b4c4d8f8ca3982e41e905825cd2474572bfbe109c00cfd3b3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm designed to direct users to potentially malicious content. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=gioteck+vx3+wireless+ps3+controller+manual
    • http://bafiselavanebep.mywebcommunity.org/rujivoxuvosiragitig.pdf
    • https://niginijepajenok.weebly.com/uploads/1/3/4/5/134505752/9282705.pdf
    • http://silujokiz.mypressonline.com/27928291405.pdf
    • http://jurojegame.getenjoyment.net/97131221790.pdf
    • http://wezotarekexu.22web.org/mevaxonuwojorajonozo.pdf
    • http://fukerijinexin.mygamesonline.org/jujevosezubutevi.pdf
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/vimexamo-lezevowunije-navuli.pdf
    • http://jedilinosur.mywebcommunity.org/toyota_camry_2018_se_0-60.pdf
    • https://liziruji.weebly.com/uploads/1/3/4/3/134380663/retugararubus.pdf
    • http://tideparipawovu.mygamesonline.org/clinical_hematology_and_fundamentals_of_hemostasis.pdf
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/3219318.pdf
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/jexotapapawota-sagisamikuzigu-donanes-fakemoruxeda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://todonoto.epizy.com/zufafojuvuzesa.pdf
    • https://s3.amazonaws.com/rujabepifar/sat_chemistry_test.pdf
    • https://s3.amazonaws.com/bisazabe/windows_10_pro_for_boot_camp.pdf
    • https://s3.amazonaws.com/napoledunadigo/46118338593.pdf
    • https://s3.amazonaws.com/fikuvine/gunepe.pdf
    • http://wozimape.onlinewebshop.net/72826857102.pdf
    • https://s3.amazonaws.com/lorerexeg/rugajejusax.pdf
    • http://dezobod.onlinewebshop.net/agri_books.pdf
    • https://s3.amazonaws.com/moduluzuxikari/gcse_biology_exam_papers_and_answers.pdf
    • https://s3.amazonaws.com/sasufufa/pixok.pdf
    • https://s3.amazonaws.com/lawakux/nulor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010509.bin
a22eee6907ffd56ada1982e198560f3c733c164d429c865e5fb00f2bf9dcce1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 5440 bytes
font_01_sfnt_off0001178d.bin
8e2b63974290dbf554bb5e27df65f75b50c1f105c81b497a7a5b87ab49db97f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 11276 bytes
font_02_sfnt_off00013e33.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E33 4324 bytes

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