Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c83842826a58d5e…

MALICIOUS

PDF

83.2 KB Created: 2021-04-09 10:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 881ec199646271a51f8be1b76bf1b79c SHA-1: 9199a243938c1023169fc133b1514eb39a1d1640 SHA-256: 0c83842826a58d5e7ca39d2901a51ac5a0e133ddd23ed1730351ff8661d83424
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, characteristic of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it's designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=i+got+blood+in+my+eyes+meaning PDF link annotation
    • http://manipiso.iblogger.org/ps3_slim_wont_read_disc_weird_eject_sound.pdfIn PDF document text
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/afa194376a7f5da.pdfIn PDF document text
    • http://vuwusud.iblogger.org/72896437432.pdfIn PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/dudogifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_5fd9fb51c7eaf.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/24573678457.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/61793054343.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/bsc_analytical_reasoning_book.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/a72d4b7429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5ff905bd7db4f.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/uv-5r_chirp_radio_did_not_respond.pdfIn PDF document text
    • https://nudesobaxoxis.weebly.com/uploads/1/3/4/6/134666739/582d020d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_604dc730ace5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fdf0a6691f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495846/normal_6010fab1bbdf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/wing_chun_kung_fu_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53533b6b-1476-4a9b-bddb-2b4e62e7fab5/behringer_u-phoria_um2_audio_interface_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b094abb-6601-4bdf-8537-5f2926d728f6/everstar_portable_air_conditioner_mpa-08cr_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2f429c-5beb-4334-b7fb-584584aee581/80907772586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21d6e9c-e0f9-4287-9530-f48fc00c6760/a_modest_proposal_vocabulary_practice_copy_master_answer_key.pdfIn PDF document text
    • http://wadatenut.rf.gd/bruno_latour_politics_of_nature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e369234a-2020-493a-80f4-a011b6c17017/the_name_of_the_wind_online_textbook.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_off000108c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C2 5228 bytes
SHA-256: c29b18fbe7cf898c672af7e841f5b17b4e90042434d7e8c4d3f753d0d2d2b317
font_01_sfnt_off00011a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A81 10792 bytes
SHA-256: 519a0a0302c325f320b288114b9ef49686fa8d445299bac2f8ba7778503b86f3

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