Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ea74518f3b3e2d…

MALICIOUS

PDF

87.0 KB Created: 2021-06-13 12:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e990b63ab4e1cf4cfa9214a34443a31 SHA-1: d8eb15415add59df40af9bc9493ee60dbf907fbb SHA-256: b9ea74518f3b3e2ddc7ce06d454c497f7deeb6200a19bd920c36fd24aa5d322e
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one prominent URL pointing to a suspicious domain 'pixomot.ru' that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'commercial action plan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://pixomot.ru/pbw?utm_term=exemple+plan+d+action+commercial
    • https://cdn-cms.f-static.net/uploads/4414167/normal_60c0bb30b19f0.pdf
    • https://cdn-cms.f-static.net/uploads/4459463/normal_605b42b55fff2.pdf
    • https://vesedosaripiwuj.weebly.com/uploads/1/3/1/6/131636692/vubawalitugorodadobu.pdf
    • https://cdn-cms.f-static.net/uploads/4404953/normal_6013a2ba748b3.pdf
    • https://nojenekaxaxi.weebly.com/uploads/1/3/4/0/134017841/nasibukejutitop.pdf
    • https://wofimokenodifi.weebly.com/uploads/1/3/5/3/135331476/besinexaw_tofoluxij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vatumulilugo.pbworks.com/w/file/fetch/145223757/15238059329.pdf
    • http://redejok.pbworks.com/w/file/fetch/145139940/cisco_quiz_chapter_2_answers.pdf
    • http://bojirakaj.pbworks.com/f/vemosezenokafiwojafowapo.pdf
    • http://guwikup.pbworks.com/f/dragon_ball_z_shin_budokai_3_download_ppsspp.pdf
    • http://tereburokofe.pbworks.com/f/borg_rating_of_perceived_exertion_rpe_scale.pdf
    • http://vejivab.pbworks.com/w/file/fetch/144889320/lego_ninjago_shadow_of_ronin_apk_obb.pdf
    • http://kiletejude.pbworks.com/w/file/fetch/144607707/what_are_the_steps_of_the_startup_process.pdf
    • http://poguvovuk.pbworks.com/f/one_piece_kiss_anime_dub.pdf
    • http://japomajuxire.pbworks.com/f/legodupugipasud.pdf
    • http://mokapuv.pbworks.com/f/accounting_information_system_james_hall_7th_edition_free.pdf
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144592332/29950197752.pdf
    • http://nimojugaf.pbworks.com/w/file/fetch/145182480/call_of_duty_apk_mod_download.pdf
    • http://lagawiwefe.pbworks.com/f/continuous_control_with_deep_reinforcement_learning_cite.pdf
    • http://dakenesemi.pbworks.com/f/gukonukepepabutifup.pdf
    • http://tawifem.pbworks.com/w/file/fetch/145050213/1770803204.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_off00011215.bin
5ccaa0113e42420f2ac31e77424652802adb6e752497429074d8bba4e166cd6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 5068 bytes
font_01_sfnt_off0001233f.bin
f3a984b8c32ef07066fba9553caf31ab88554ecbf711f286568cc8446d8087e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233F 13324 bytes

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