Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a2a6783c0429ce…

MALICIOUS

PDF

70.0 KB Created: 2021-03-14 06:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4261d12e0911eb434bb5958d1a2eff20 SHA-1: 2a757b543936dc1829d87faf00643068897dba9c SHA-256: 04a2a6783c0429ce63358f0552a47586e4e43fc6b89f71952162f725dccb1184
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=step+2+neat+and+tidy+cottage+stickers PDF link annotation
    • http://zatoxuvisovapuf.sportsontheweb.net/neoliberalismo_mexicano.pdfIn PDF document text
    • http://uaregroup.com/wowilatosawuwefusawafadcz83h.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/77596555823.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/kiwebatitimalebevijafim.pdfIn PDF document text
    • http://teenagetutor.online/antropoloji_sorulare3mfv.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/how_do_you_draw_out_an_infection_in_your_finger.pdfIn PDF document text
    • http://zedukibawubige.22web.org/84922987354.pdfIn PDF document text
    • http://pasetbs.xyz/sidogulurofeloxafuklf9aa.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/1558728452.pdfIn PDF document text
    • http://penerete.66ghz.com/enlace_quimico_covalente.pdfIn PDF document text
    • http://iranianvc.com/renag3v1em.pdfIn PDF document text
    • http://jezewujedufeg.iblogger.org/chloroform_storage_temperature.pdfIn PDF document text
    • http://zuvakaxosamota.22web.org/steering_group_meeting_template.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/moments_skewness_and_kurtosis_in_statistics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tumapaluk.rf.gd/1351065240.pdfIn PDF document text
    • http://noxifepa.rf.gd/37744544377.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/28280656359.pdfIn PDF document text
    • http://gufogima.epizy.com/32077322069.pdfIn PDF document text
    • http://rexawisoza.epizy.com/one_approach_to_performing_compaction_is_to_do_it_when_a_certain______of_memory_becomes_busy.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/exterior_grade_plywood_sheets.pdfIn PDF document text
    • http://zezexobufimorum.epizy.com/the_witcher_3_wild_hunt_prima_collectors_edition_guide.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_off0000d1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FF 5612 bytes
SHA-256: 2e53fecef1afbb8fc394d7ad69889855e8652b0835e7d426a941b175f6a11ffd
font_01_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 11172 bytes
SHA-256: 682b470484779136c7d55bccbf07b0d6bfaaaaf88e6c9c3ba1af49e26d51cf92

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