Malicious PDF — malware analysis report

Static analysis result for SHA-256 33acd1f8f27986f6…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 16:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 85c12c62c6e5127ba2f1bf8fee998e83 SHA-1: 4582bffb52369598082a6dc232dde04feee3c9d9 SHA-256: 33acd1f8f27986f6c1d5036788537d5a0f395b8f1738cb3c9dc8926ff5c6491e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'strength training anatomy workout pdf download'. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing or downloader attack.

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://maypoin.ru/award?keyword=strength+training+anatomy+workout+pdf+download PDF link annotation
    • https://julovupepopa.weebly.com/uploads/1/3/4/5/134522834/215933.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/ca_lease_agreement_laws.pdfIn PDF document text
    • http://ziratonis.iblogger.org/32047802741.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/fotefujuso.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/what_is_the_best_skilled_trade_to_get_into.pdfIn PDF document text
    • http://zaroramo.22web.org/english_for_dummies_amazon.pdfIn PDF document text
    • https://basivuto.weebly.com/uploads/1/3/4/6/134646412/8489192.pdfIn PDF document text
    • https://wijedokimevu.weebly.com/uploads/1/3/4/6/134649091/af7ae678c152b.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/why_my_car_subwoofer_is_not_working.pdfIn PDF document text
    • https://pigasuranebuja.weebly.com/uploads/1/3/4/4/134459694/vutuz.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/photoshop_certificate_template_psd_free.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/gabafifogewosuloxew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_708686e29d5645ceb2976170e5e0d9a7.pdf?index=trueIn PDF document text
    • http://pinisexukatata.rf.gd/foworefamijaxuwak.pdfIn PDF document text
    • http://nobidaponofuxul.epizy.com/65325593860.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/ccna_security_lab_manual_free.pdfIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_6d0f5ab089ac45a6a28e754641265599.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_bd338157884444beadbe2ca77dfdcc54.pdf?index=trueIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_57a9fb5205884153a05cbe062e2c2a10.pdf?index=trueIn PDF document text
    • http://jujewejono.epizy.com/physical_science_math_skills_and_problem_solving_workbook.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/mapa_baixa_lisboa.pdfIn PDF document text
    • http://gidepajujida.rf.gd/academic_word_list_coxhead.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_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 5640 bytes
SHA-256: bb43d847f57c075f4c375c5b6418a21f652141c97f59f6ba623178c5e71a333b
font_01_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 11548 bytes
SHA-256: 13a031f68669ceb619c3fb846841fb0aec48b2bf1a0140faab2804526c49393c

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