Malicious PDF — malware analysis report

Static analysis result for SHA-256 909ad2d0aac73565…

MALICIOUS

PDF

94.5 KB Created: 2021-04-01 02:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb6596c7362477e9e0c3d85f8586ef59 SHA-1: 91772dd1393dd391d4aa16eac6bc763be4ab2478 SHA-256: 909ad2d0aac7356567ffb5f2b5f6c6258c5cd06bf9475d65ed72880656e7e588
134 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The presence of urgency language in the document body further supports a phishing or social engineering attack. Although no scripts were explicitly extracted, the PDF structure and external URI findings suggest it likely contains embedded JavaScript to facilitate redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/123?utm_term=form+arcosanti+set+times
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/negijedus.pdf
    • http://powogole.iblogger.org/92293520796.pdf
    • https://cdn-cms.f-static.net/uploads/4387050/normal_602a2eb1725df.pdf
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/6154183.pdf
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/eb229c.pdf
    • https://cdn-cms.f-static.net/uploads/4454054/normal_60362db5a63f6.pdf
    • https://cdn-cms.f-static.net/uploads/4476010/normal_60174aad5c623.pdf
    • http://mowuvivof.22web.org/xamarin_forms_button_icon_xaml.pdf
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/a30e4023.pdf
    • https://bipesulevawitod.weebly.com/uploads/1/3/1/4/131437914/gutekekadepinolemiv.pdf
    • http://silujokiz.mypressonline.com/89419673777.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sobemub.epizy.com/noside.pdf
    • http://noxebujo.epizy.com/activities_for_preschoolers_about_colors.pdf
    • https://uploads.strikinglycdn.com/files/404fb710-af56-4ab0-ae43-3e7f043566e0/behind_closed_doors_song_year.pdf
    • http://xobeminal.atwebpages.com/formula_for_volume_and_surface_area_of_all_shapes.pdf
    • http://bitujiduruv.myartsonline.com/33537631047.pdf
    • http://kiroxivox.epizy.com/silegirelarip.pdf
    • http://dikewovob.epizy.com/90700760807.pdf
    • http://gupizamowakop.myartsonline.com/sport_marketing_4th_edition_human_kinetics.pdf
    • http://fesitakisuwizun.rf.gd/ablestik_56c_data_sheet.pdf
    • https://uploads.strikinglycdn.com/files/92c52a36-d91e-46f6-b018-ab877f20b94b/37471002653.pdf
    • http://kikanelomer.onlinewebshop.net/patepokit.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6e.bin
34548adc00e841ab64c09969a4b6326142284e6fa7944aed8e6aab403079d218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 4868 bytes
font_01_sfnt_off00010cd7.bin
48f9ad7afb47111e564b2f524ecd2299f711f471025fba432e43aaaf21043524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 11208 bytes
font_02_sfnt_off00012cee.bin
0b7f6a45d8708157b1a57cdab9839d0498785a2cc5fd79ad03aa91dfa3bb54ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEE 12080 bytes
font_03_sfnt_off00015609.bin
a752a0a07a1d6c2e7b072e88538da068d2c12574007a628f7464629b5e3d86e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15609 16360 bytes

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