Malicious PDF — malware analysis report

Static analysis result for SHA-256 3930f57b279e9f6d…

MALICIOUS

PDF

69.8 KB Created: 2021-03-23 13:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e4c03c1e2a85d113a4c59c35ae0135d9 SHA-1: f5e94678f61da5644c6baade1f43075c8573c947 SHA-256: 3930f57b279e9f6dc76a97f8a8ad29a174368719f70a53ff018c25f99658043f
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating it's a phishing or trojan attempt. The document body, though heavily obfuscated, suggests a lure related to 'Ap psychology review packet'. The embedded URI points to a suspicious domain, likely serving as a landing page for the phishing attempt.

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://leonvi.ru/strik?utm_term=ap+psychology+review+packet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5fdbfcfa93149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5fec88b3afef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459796/normal_603bdbf1a1d8d.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/84499124139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_601f6d8621b91.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/bCSs7jd/nearby_friends_facebook_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/Bije71A/mod_sans_smp_season_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449004/normal_6007dcb5cf3e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_5fd1b58a7c0c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff96d2b9a88a.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/morisalapojujutojojudediz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_60190cc09519e.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/1ffd975d-7905-4f47-8df1-0e640c390e75/dekeloxameboxajiko.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/84212992964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1befd892-ecf6-42f4-9d9c-c597cfadf869/what_is_a_novice_ham_radio_license.pdfIn PDF document text
    • http://murapimopavopa.myartsonline.com/anthony_giddens_the_consequences_of_modernity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1be047-67e5-4f29-9e9d-a38a809c9549/dr_terry_wahls_diet_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03fb340a-41a7-4ccd-a683-cfece30c84c1/10221433436.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/learning_bass_guitar_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265bf612-b806-4d0e-a7a5-73d88a7276e9/char_broil_big_easy_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9757db-54c2-4488-bb88-a085cf570af9/365_days_writing_prompts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0dc468-7afd-41d8-b852-a1e42c0ab996/robemididefumob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a2c450-9816-4f80-9e51-6b0d9b769f41/can_you_visit_the_air_force_academy_in_colorado_springs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6539ee02-5d98-49fb-b45b-face06ae2b5b/mubaxutipijasexorukad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 5504 bytes
SHA-256: 81e1b89d7f9fffb665292b10b4ba9488440e6f05d476380a9a601c31ff6d0885
font_01_sfnt_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 11044 bytes
SHA-256: 4b8fa16e9c91d5f57caa96e9fe714cf5fd10abf27b093b7b01ff96fadb010eee