Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f95ef66fe886166…

MALICIOUS

PDF

76.7 KB Created: 2021-06-04 20:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1da45d877bd9383773b429f721028093 SHA-1: 40e6b5f3010b0579ac33cf3f8c65e5571fbabfa1 SHA-256: 2f95ef66fe886166571bf3ff12447bec6b1c5cc019c282899fdcf0cee3a10e33
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as search results for popular content. The primary URL, 'https://medvor.ru/pbw?utm_term=kingsman+2+full+movie+in+hindi+download+moviesflix', suggests a lure for pirated movie downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://medvor.ru/pbw?utm_term=kingsman+2+full+movie+in+hindi+download+moviesflix PDF link annotation
    • https://lepimezuraz.weebly.com/uploads/1/3/4/5/134599896/835e214c2a.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/2bd5fe.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/danutozuboj-niwirufoda.pdfIn PDF document text
    • https://mazokozofifux.weebly.com/uploads/1/3/4/3/134305155/394951.pdfIn PDF document text
    • https://muzunamarufo.weebly.com/uploads/1/3/4/4/134463020/kojaguporax_kagezoxam.pdfIn PDF document text
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/6928614.pdfIn PDF document text
    • https://fizubuvi.weebly.com/uploads/1/3/5/3/135301632/4302414.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/205015f6-4310-4f9e-be36-523f89e99743/fegofawalowabunod.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/gaduvuvaleduzijukerilol.pdfIn PDF document text
    • http://pudamalulera.pbworks.com/f/sidurer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7972a6f-4a8a-4adf-9ddf-b36facd0d25c/pathfinder_animal_companion_magic_item_slots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85b81ad-cf39-46be-87e4-94203617890a/46173082774.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/144604947/solving_right_triangles_with_trig_ratios.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/what_is_dimensioning_in_technical_drawing.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/how_do_i_connect_my_ipad_to_my_brother_printer_label.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0ff9ff-f0e4-4518-8814-d27a7d9b3fd1/takatoxuvatuzomip.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/what_do_the_pssa_test_scores_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ce51c8-8a2b-4427-9b54-2ff0dc59c8ca/zodiac_signs_and_meanings_and_compatibility.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/w/file/fetch/144584982/sample_job_description_of_chemical_engineering_technician.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f361da8-7859-4347-abe9-e49353497707/sitotojoxadapim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d1fe55-2062-451f-b6c9-f30919ab7fce/doxawanomasejo.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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 5548 bytes
SHA-256: 792f7b335d205d8504bebed0bf35479fe4dc7572025e0cebaa08b4c12a10c61b
font_01_sfnt_off000100f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 10660 bytes
SHA-256: e800843458a2a0e47448ad2ed44bba3a9495e493a507a4aa3a1c62da22a65a37