Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a02ecbc25a5f2c…

MALICIOUS

PDF

66.7 KB Created: 2021-04-05 13:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 76e2461762d7d28e4c990c16356f0a78 SHA-1: 869e902a8362a364bc0c065f7eae27efcbf22738 SHA-256: 54a02ecbc25a5f2c626d924c2e339cb1d697a8cba3ee9372e95878bc750df70e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs point to sites that likely host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=cetirizine+hydrochloride+bp+monograph+pdf PDF link annotation
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/7845207.pdfIn PDF document text
    • https://xeligedijeka.weebly.com/uploads/1/3/1/0/131070237/2055403.pdfIn PDF document text
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/wupototi.pdfIn PDF document text
    • https://rujuramokukavet.weebly.com/uploads/1/3/0/7/130739146/2add90091a795b.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/pexinesakifoteb_gifitefogavogu.pdfIn PDF document text
    • https://nufulukoveta.weebly.com/uploads/1/3/4/7/134700555/6521204.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/qMiirTs/shelter_animal_rescue_group.pdfIn PDF document text
    • https://gewilede.weebly.com/uploads/1/3/4/3/134311853/kolemavobuturek.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/jdjjiis/fruits_contain_vitamin_d.pdfIn PDF document text
    • https://reravojune.weebly.com/uploads/1/3/1/4/131406269/4c534bbaa990.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/UFvhfKW/96232702748.pdfIn PDF document text
    • https://sezitoxonuga.weebly.com/uploads/1/3/4/8/134886233/jerawen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://beea745c-e446-4317-9ad8-fe501d584c0a.filesusr.com/ugd/9196db_8c7442e1ea51461ea5ffe08308cc9907.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_081904df2ddf4cfd9d24c3166f30d1ab.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_12882466f49e457abd7b425a9a87b176.pdf?index=trueIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_e1fd9d8fe291473c942d0800853fbf0b.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_off0000c731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC731 5588 bytes
SHA-256: 926c49c1f9fdd4448270ae48e272ff7f0fe5b473b52ac532300f9bfe91060ca2
font_01_sfnt_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 10392 bytes
SHA-256: 59016a28a9cb87621f76d65da24a9da642a774ae6ece8aae0b5210e951bc1ba7

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