Malicious PDF — malware analysis report

Static analysis result for SHA-256 37afb29f18886aed…

MALICIOUS

PDF

94.5 KB Created: 2021-03-30 18:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 17ad1c8ed1e928bd6ce9cc3a86bfe00a SHA-1: 782f99b0289a905d66251f7e3f074dca22419bfd SHA-256: 37afb29f18886aedc1d95d6884960224bb615eb0f3b456d1454c063363c65b3d
126 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is identified as a potential phishing lure. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to the lure URL, suggesting it's designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/award?keyword=antecedentes+historicos+de+la+fisioterapia+pdf PDF link annotation
    • http://zesaguzijor.mypressonline.com/tudezoxibuvu.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/electrician_work_experience_certificate_format.pdfIn PDF document text
    • http://nuzenurego.22web.org/brainly_verified_answers.pdfIn PDF document text
    • http://wofirulufe.iblogger.org/centos_6._9_x64_iso.pdfIn PDF document text
    • http://runivofo.iblogger.org/69400303185.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/1991087903.pdfIn PDF document text
    • http://notojubemeduxan.iblogger.org/ryobi_universal_router_table_parts.pdfIn PDF document text
    • http://meetsalle.xyz/64575218481gkyzo.pdfIn PDF document text
    • http://emirofficialzm.com/79026742664hdwbl.pdfIn PDF document text
    • http://garderob-podolsk.ru/poulan_pro_16_chainsaw_chain_replacementcqv4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sumemefa.rf.gd/how_to_get_car_started_with_low_battery.pdfIn PDF document text
    • http://bexalawisilinot.epizy.com/zomakevodigamivogujabu.pdfIn PDF document text
    • http://bamakumaxibuwab.rf.gd/3415597312.pdfIn PDF document text
    • http://fidepogomuvi.rf.gd/great_casterton_primary_school_ofsted_report.pdfIn PDF document text
    • http://wutorokanotomav.onlinewebshop.net/lovarogalusotatojuvux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5451bb75-671c-470f-b8c9-79271068d9d2/88203400485.pdfIn PDF document text
    • http://sojidalome.rf.gd/negafule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c011a388-1dff-42f0-ae45-3c9713e07fb2/how_to_get_specialty_certification_in_nursing.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_3eeca1dfa4f04ab5b513dcab05496d70.pdf?index=trueIn PDF document text
    • http://dajodenojekox.epizy.com/71987074417.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_e45952dd5dee496e87a9e3135623996b.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_eb58a6d3948f47b58bf69c32e10a2c75.pdf?index=trueIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_bf056b68ca0e4bc8a84f75d7d5ce27e3.pdf?index=trueIn 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_off000133f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F3 5232 bytes
SHA-256: e46375f0694a8a6d939ae502649125ff920c4d477f6a595715422b081eece19b
font_01_sfnt_off000145bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BF 12212 bytes
SHA-256: fdeda3280ddeeda754b13e284ee54765f391cdde034743c161f007cd6a4187e4

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