Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff855de37cbfab6d…

MALICIOUS

PDF

91.1 KB Created: 2021-03-15 22:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f3f98b2ca9a783dd0d4b6c73e265209 SHA-1: ef1610bd06f8086d1c92d298eb21c3cc09d0fa2b SHA-256: ff855de37cbfab6ddd20942bb154ae063d167d354b436f98695c1252ebcead50
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the presence of external URLs suggests the document is designed to redirect users to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/aws?utm_term=setup+linksys+wrt54g+as+repeater+bridge
    • http://yewes.space/real_cash_games_win_big_prizes_and_rechargesvhlqn.pdf
    • http://fb-ig-copyright.com/48080789895n37m5.pdf
    • https://cdn-cms.f-static.net/uploads/4404966/normal_600f5c66484ea.pdf
    • https://static.s123-cdn-static.com/uploads/4483586/normal_5fcc4906723c0.pdf
    • http://lizowaw.scienceontheweb.net/wazibirixete.pdf
    • http://powajaxib.medianewsonline.com/city_of_the_beasts_chapter_15_summary.pdf
    • https://cdn-cms.f-static.net/uploads/4405950/normal_601e4d6124339.pdf
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5fcf9505b43c3.pdf
    • https://cdn-cms.f-static.net/uploads/4425915/normal_6010aa4d977e8.pdf
    • http://natorg.fun/bodyguard_muniswaran_tamil_dubbed_movieami3e.pdf
    • http://zukesijinizik.mywebcommunity.org/36530030987.pdf
    • http://euroshopmn.space/chromatic_scale_guitarl7fcl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5ba382ef-a2ae-49dd-94cf-7f4a4b9a34cb/one_day_in_the_life_of_ivan_denisovich_length.pdf
    • https://uploads.strikinglycdn.com/files/b832fa70-189a-4fc3-b350-5bb52b5eb18a/master_forge_outdoor_kitchen_parts.pdf
    • https://s3.amazonaws.com/tubupejevomo/vedirowegulutipo.pdf
    • https://uploads.strikinglycdn.com/files/f36ff432-3a72-426e-b7c1-ff656ff3959e/capresso_infinity_conical_burr_grinder_troubleshooting.pdf
    • https://uploads.strikinglycdn.com/files/59ddcefe-c8bf-4fe3-a416-20f9dcd993de/baba_ramdev_yoga_book_free_download_in_hindi.pdf
    • https://s3.amazonaws.com/zobuwubedak/spiegel_im_spiegel_violin_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/adab38c9-5f6b-400a-8638-77f287765a4c/what_are_the_steps_in_product_design.pdf
    • https://uploads.strikinglycdn.com/files/5c15398e-f1e6-4ebf-9ad1-c15d366120df/how_to_replace_viking_range_knobs.pdf
    • https://s3.amazonaws.com/wozoxub/solving_linear_inequalities_word_problems_worksheet.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/24076750333.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe7.bin
44e88696a64eecb35669ffd06b99f6628b5812dcbdcc79bc238184c5ac6f0868		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 5840 bytes
font_01_sfnt_off000113ef.bin
6814d39649123a00dadbc6cdac92e22dd5acd0ed577fdf5125c4b8acca175ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113EF 23372 bytes
font_02_sfnt_off00014790.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14790 16204 bytes

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