Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45ab1c72617112b…

MALICIOUS

PDF

69.7 KB Created: 2021-03-10 01:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c519ae433ac4a0902588508fd56ac847 SHA-1: 323e09afef21e3f4130709540fc09d9de3de165b SHA-256: d45ab1c72617112b6e4574aa474c51d2169a040d8cde85979ce84dca5b7dcfeb
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=107+bus+schedule+nj+transit+pdf PDF link annotation
    • http://pitikudefojeken.getenjoyment.net/what_are_the_symptoms_of_a_bad_pcm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451949/normal_603aff19aa4f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_600b14b524b65.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/94978399216.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/hodgdon_reloading_manual_2021.pdfIn PDF document text
    • http://betomererag.iblogger.org/does_god_have_power.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386609/normal_5fcdae3084840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_0dbaab7e2a9b417c9ea19756772eac4b.pdf?index=trueIn PDF document text
    • http://jubagas.epizy.com/43873768270.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/synonym_worksheets_for_first_graders.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_0334e847063e42908a32bf3d0a81e6fa.pdf?index=trueIn PDF document text
    • http://doriponesarom.myartsonline.com/sunbeam_cool_mist_humidifier.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_19172663977241cd957e865174431941.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/43126171046.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/nitabiwutevukeva.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_2c1513321d124951b036a160709b5162.pdf?index=trueIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_f99694dd8ace486f8f208210cba0f38d.pdf?index=trueIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_f1649451b4124538acaffe10524fa5a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/school_leavers_cover_letter_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 5408 bytes
SHA-256: e9ccb30844a552f1b6b52f704d2f63f99331b9dc335b8ac09dbf19fabb0e8ad6
font_01_sfnt_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 10188 bytes
SHA-256: 755b18694b626da317c80c33ef591b9b2c7f6e0c4d1607a9947722a252661349
font_02_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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