Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ceef11b473f017…

MALICIOUS

PDF

72.2 KB Created: 2021-03-15 03:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 995f98f5bd334cebd1a0154a188ea948 SHA-1: de429221f9208b0834cf7375b0e7defcc58be7fc SHA-256: 07ceef11b473f01781d7cb6f04b478a8c50251d065aac8daa825143784556ba2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with one prominent example being 'https://ponafet.ru/123?utm_term=self+report+altruism+scale+rushton', suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of hosting many links on disposable domains, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=self+report+altruism+scale+rushton PDF link annotation
    • http://xawamiwupajev.mygamesonline.org/redshift_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/haigie5/real_college_football_jerseys.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/english_creative_writing_worksheets.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/paradise_lost_book_1_plain_english.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/nursing_theories_and_their_work_9th_edition.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/afinidad_electronica_unam.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/jagfHgf/48565189223.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/how_well_can_you_follow_directions_worksheet_united_states.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/hIgjhjc/xebakar.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/99227760505.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/cichbjd/jelotavajorexofav.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/keystone_rv_furnace_not_working.pdfIn PDF document text
    • http://topagudupowugi.iblogger.org/55976851630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_62f074f1f0e14841b698e85784a63716.pdf?index=trueIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_4e017876eb6147ec910cf261cbc33695.pdf?index=trueIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_f1a3a2ed99764aea932c8595058c9106.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_d3948826f26841cd872c9e3c4fb6a4de.pdf?index=trueIn PDF document text
    • http://pufaperimixalet.epizy.com/2985492786.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/tetugefofewosulu.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/amide_formation_using_edc.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/35522223696.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/67435193848.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/maths_box_skills_check_answers_83.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_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 5356 bytes
SHA-256: 9768cadb13417aa8404d18c6809bac056f36c313fa45069244d6c5b40689bf38
font_01_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 10636 bytes
SHA-256: f0b7a5487850809f0377aa1a6dd1d972e237b44e03ff169ef36bf2cb9e08b59b