Malicious PDF — malware analysis report

Static analysis result for SHA-256 122d707d315d0bb1…

MALICIOUS

PDF

77.1 KB Created: 2021-03-17 15:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 56cda60330e7983efa70d9133efa7159 SHA-1: cbd693762e6ce0125ffcf30b665a343269c3f87e SHA-256: 122d707d315d0bb122fdf27d13d84eda59aeacebd7f9abb747298c7d961aff34
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs and is structured as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of 'cmd.pdf' and related URLs in the document text, along with the 'SE_LOLBIN_RUN_COMMAND' heuristic, indicates an attempt to execute commands or exploit vulnerabilities, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://ponafet.ru/strik?utm_term=what+does+phantom+power+mean+in+audio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6011e5d66e654.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/rAGuEjc/first_words_flash_cards_jojo_maman_bebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fd8cb4f1c903.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/best_football_workouts_at_home.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_6036571097fd9.pdfIn PDF document text
    • http://openchambre.xyz/zikil00lf6.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/dT5idhe/halloween_pinball_machine_for_sale_australia.pdfIn PDF document text
    • http://vitetiw.getenjoyment.net/how_to_make_bootable_pendrive_with_cmd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd1522742cf5.pdfIn PDF document text
    • http://hookup154.online/tufipogubifgkvg.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/dujujema/2ghhfjb/clouds_aristophanes.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/gixotagokezu/uhgZgjf/levi_s_x_star_wars_501.pdfIn PDF document text
    • http://cookwellbakewell.com/is_mcgraw_hill_act_book_goodndsj6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ffab04612e36.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/the_trials_of_apollo_1_download.pdfIn PDF document text
    • http://genusadnlo.space/43951002968td0m9.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/jjxgigf/96721586679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3fbfe5-14b3-4c78-9414-55f8a50fc370/31652885000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda5af4a-1260-4089-93b6-3a8f3cc1cfb5/dunkin_donuts_138_stockbridge_ga.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/germanium_transistor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/why_do_you_want_to_marry_your_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/start_tor_browser_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c636a935-f67d-4291-bfe7-d3374c2169fa/xoribesuviwodopugere.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/giwatifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da9ae7e-6292-4f69-bc1f-ad9da4d96281/avon_skin_so_soft_dry_oil_spray_mosquito_repellent.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/ielts_speaking_model_answers_part_1.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_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 5272 bytes
SHA-256: 2a6ab507261816ad23a3233cf449ebf9647bde3d9f8e9421fc663d552e210396
font_01_sfnt_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 11320 bytes
SHA-256: 21f5ef87df76e6c05c40ffc1ea1f8a83d91f0a1c589d9b7b6d9437a1b2e31bda

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