Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bb1b16e896d8aa…

MALICIOUS

PDF

85.5 KB Created: 2021-05-02 09:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b08cafc97291491080a6455f381bb0ba SHA-1: 214b8d51623b770eeb915310ddca776ff6155e4c SHA-256: 16bb1b16e896d8aa762b9b7f814f0de42a7a8f5f630c456262fd250349708e37
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=vw+020+trans+codes PDF link annotation
    • http://rolevuses.iblogger.org/30799183607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5ff50a4281cde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369168/normal_5ff48aa9c1fc1.pdfIn PDF document text
    • http://fruit-citrus.space/racing_mania_pc_game25owd.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/after_effects_free_transform_mask5yp34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_604b7e23db1c2.pdfIn PDF document text
    • http://lozosomegav.iblogger.org/zombie_catcher_mod_apk_free.pdfIn PDF document text
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/3025150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_606bfaf0a371c.pdfIn PDF document text
    • https://xomugiwonin.weebly.com/uploads/1/3/4/2/134266294/mikum-tikanedezusumul-divuko.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/xugatobazoremeoh97s.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/zawuwalo.pdfIn PDF document text
    • http://dashcamtopbest.com/certificate_of_origin_form_dhl0ob92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_60168c452667a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/163edf38-eeb3-40ad-af12-7fdf2f96a133/27069828850.pdfIn PDF document text
    • http://posikin.myartsonline.com/astral_travel_frost.pdfIn PDF document text
    • http://noxexisotagizez.epizy.com/vuxuxizajawipu.pdfIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/jesosolasezexuvubag.pdfIn PDF document text
    • http://telosizaba.onlinewebshop.net/moravukurapimasebabilaxud.pdfIn PDF document text
    • http://filazit.epizy.com/google_translate_english_to_khmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac335b45-0f88-4456-b531-3a74e34f3c8f/moultrie_a5_gen_2_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee3d032-56e8-4ca4-9bfa-e7a71aec7936/mixotowawi.pdfIn PDF document text
    • http://daximogosamov.myartsonline.com/wutujinuf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 5232 bytes
SHA-256: 73a427ad9292a21b064495ff3cc1617dbb937c29ddba42fc7d0350507a158a41
font_01_sfnt_off00010ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 10896 bytes
SHA-256: b16152d4bf76df0221f5a37372475c0e3f2a1ab2eddbb7a89ec1962da0c261ae
font_02_sfnt_off0001330a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e