Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ed6f22740501fb…

MALICIOUS

PDF

91.9 KB Created: 2021-04-18 00:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 84de66cf1fda9e1df06f262dd4b1d111 SHA-1: cfcf2d3b13ec2e4e11c091685ce311162052d416 SHA-256: 30ed6f22740501fb1a48750842c9dc60a0db0f654aaab4712620c479e51517b6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm. The primary URL, 'https://druttle.ru/strik?utm_term=how+to+find+adobe+cs3+serial+number+on+computer', suggests a phishing lure related to software serial numbers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://druttle.ru/strik?utm_term=how+to+find+adobe+cs3+serial+number+on+computer PDF link annotation
    • http://derifupiwa.mypressonline.com/gurijez.pdfIn PDF document text
    • http://doctorzlo.com/delonghi_magnifica_s_instructions4utbb.pdfIn PDF document text
    • http://arevakar-travel.com/the_wind_in_the_willows_1995_moviebf15e.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/building_muscle_101.pdfIn PDF document text
    • http://dvigatel.guru/where_to_donate_clothes_to_near_me4ebk3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_603a779ca3dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_601bfc95adb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_6018327d2d7e7.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/ca_api_gateway_documentation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_605275fa16d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5fcc9cc75b9de.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/how_old_is_google_maps_street_view.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lesodabat.epizy.com/zufafarujomesaros.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_4d96c16468714a089dd946e403aaf05d.pdf?index=trueIn PDF document text
    • http://gatakokuto.rf.gd/deeper_pro_plus_user_guide.pdfIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_34a76262867047d18da973654d324022.pdf?index=trueIn PDF document text
    • http://bajokekez.epizy.com/appserv_free_for_windows_7.pdfIn PDF document text
    • http://gobaligene.epizy.com/avast_software_updater_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE8 5540 bytes
SHA-256: 282be4c2ee28e0a5509e82c40822246a2ab0f75ac7349cbe3226828fee578661
font_01_sfnt_off00012dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAB 11284 bytes
SHA-256: 8a3cd570031438e792dbd9f7ebd0ebaaf951b838e406e593b6091a0dcd591682
font_02_sfnt_off000153fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153FA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3