Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf751da86748a02…

MALICIOUS

PDF

89.9 KB Created: 2021-03-22 21:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: afb348ae6708d546a6b5015377670866 SHA-1: 4669567a1ac2c6fb973166b488f791c681cbd7d8 SHA-256: edf751da86748a028bb82e3278c3203d410438be3f582106aac578a9ab68adb9
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, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'maypoin.ru' which appears to be a lure for product information, likely a pretext for a phishing attack. The presence of multiple disposable domains and link farms suggests an effort to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/wix?keyword=bandai+power+rangers+dino+super+charge+deluxe+dino+charge+morpher PDF link annotation
    • http://erse.xyz/996409275743lz7w.pdfIn PDF document text
    • http://natnat.fun/40111216728f70q1.pdfIn PDF document text
    • http://znalomstvavip.site/98206992302nwx29.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/gepowixof.pdfIn PDF document text
    • http://amaryllis.space/timulutexonua7v90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_6023d2feae429.pdfIn PDF document text
    • http://ledimpress.biz/peavey_bandit_112_red_stripe_weight1obxo.pdfIn PDF document text
    • http://lomipojiposo.iblogger.org/the_late_great_planet_earth_dvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_601fe5ad97534.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://vezubigaru.rf.gd/melodujepozugurufifan.pdfIn PDF document text
    • http://dewonatazuji.epizy.com/tazaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd68c7d7-1e13-407d-80f1-110c0cc7c80e/densidad_del_agua_tabla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e1c329-2c2d-4eca-9c99-e1d1d6c5065e/dnd_5e_phantasmal_force_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022b345c-a8f5-4546-9818-c3cb034875f1/why_lenovo_laptop_plugged_in_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62528d9b-687f-4e38-a8ac-811efab1b010/raxoweraxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7029b27-fb9e-40fa-825a-000f8fd305ac/49919906635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96184229-6aa1-442f-a5f3-46369ad8944d/how_to_make_oats_for_weight_loss_in_hindi.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/mupuxaxado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e341ad00-d251-4d5a-aefa-5d836691c096/82072673310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a565d397-263b-4446-b8d7-50833bb28171/liftmaster_security_2.0_remote_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb3e45c-15c2-4eb3-8497-69add2250248/how_to_train_your_dragon_book_of_dragons_full_movie.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 3048 bytes
SHA-256: 99af43d5a2aaffbd21d55d63d7575db2600313387c9a8ef99eb72160cd4efecb
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 5500 bytes
SHA-256: f3395897a856a3a8bd9d8a0865c4f8ffb87f3a7be4268170d6baa5ed195f73a6
font_02_sfnt_off00010f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8D 11296 bytes
SHA-256: 51fa70b9dc1eb71ca4bad177cd446e31744f534be3bbe20a544e99e2a2751251
font_03_sfnt_off0001361e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361E 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d
font_04_sfnt_off00014ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3