Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3140953a6b2901…

MALICIOUS

PDF

82.3 KB Created: 2021-04-20 03:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 941dac0a6d87c346f07578cd5f1f55cf SHA-1: 5b131f6e1b387ee04c0775e74987339ee58f0e19 SHA-256: 0d3140953a6b29017e00532ef59047aaad2c098a1287b5b2a926dc58b2ee8e98
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/strik?utm_term=la+metamorfosis+de+franz+kafka+resumen+completo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417037/normal_6002c8eef2947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_606389fb2e2d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_604fd660b34be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416669/normal_5fe56419291c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483088/normal_6024667381245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_6035b8141b494.pdfIn PDF document text
    • http://fallofelin.online/call_of_duty_cold_war_ps4_to_ps5_upgrade_priceus2yh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fccd0f188220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5fdfa24235e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446917/normal_602b0cbdbd97a.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fcc8bdd80950.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/3649caee-c5cb-4a0a-861b-76ab7b7589bd/juwedofuzuxuxizezilol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fda1dca-ef44-443b-9ba6-a7a1768d30bc/swann_wireless_security_camera_system_setup.pdfIn PDF document text
    • http://mudusogej.epizy.com/bach_cello_suite_1_prelude_violin_partitura.pdfIn PDF document text
    • http://zefekalujupolu.rf.gd/kewifesafajido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f78029-b23f-4554-a97b-6ee0cd120745/how_to_draw_anime_nose_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1428b6cd-8b8e-48e1-898d-d16371c38ef2/allen_and_roth_laminate_flooring_reviews.pdfIn PDF document text
    • http://wabamuvakotobu.epizy.com/nixarezubalirufag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43ace4b-99a2-4caa-91f9-80e57646ab22/is_purgatory_mentioned_anywhere_in_the_bible.pdfIn PDF document text
    • http://xugedev.epizy.com/huskee_rear_tine_tiller_6hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c4d96f-c01f-4d6e-9018-09f632afb422/wawudirijomanuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b679f5-8731-4ae8-8c1d-8b8450669c70/free_compare_and_contrast_examples_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76c404a-4bad-4e85-9c4f-6878b83abebd/ganazovutemekutipujiwiv.pdfIn PDF document text
    • http://tabavujafus.epizy.com/xalapotid.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_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 5356 bytes
SHA-256: 6b5202639b434520474fcfec048f531e2715840115bf9157f878ef4c855109dc
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 2236 bytes
SHA-256: 6a77f955d39b9d81e75477a2b3a68a06f90d7b352a411c8fd057aba46c531b2e
font_02_sfnt_off0001120a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120A 12100 bytes
SHA-256: ba126ae2c7c0dcc82ba39b08051f2228c25b3e01a501a886b5e012f913c41b23