Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3e58b3f4887715…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 19:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c9d5b207de2d167145a20c0ce85be4de SHA-1: 059ca7681eb0cae2eb4b2fdb306f36620257cd42 SHA-256: be3e58b3f48877156e523ec61367bbbf24a472d5749b1b76bbf432f5504622d7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to reference search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://jumiwimov.ru/123?utm_term=beethoven+piano+sonatas+henle+pdf PDF link annotation
    • http://xelowonol.scienceontheweb.net/biodiversity_and_conservation_mcq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fc71505a4e34.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/bhagavatam_in_tamil_free_download.pdfIn PDF document text
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/pitaxige-lozusugizod-wenefiw-lazolej.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/antony_and_cleopatra_shakespeare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_60055808dc239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_6021a8c309952.pdfIn PDF document text
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/nolelebileret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_602fd31a61532.pdfIn PDF document text
    • https://fupakedozoj.weebly.com/uploads/1/3/1/4/131407080/2092037.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/gobifaxuxufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_604d802f2e6b2.pdfIn PDF document text
    • https://tumozoredupoki.weebly.com/uploads/1/3/0/9/130969837/a55783349da.pdfIn PDF document text
    • https://zunezazawegor.weebly.com/uploads/1/3/4/6/134665047/2284479.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/bharat_ratna_award_winners_list_download.pdfIn PDF document text
    • https://pasifoberili.weebly.com/uploads/1/3/4/8/134881239/menewijisizel_fesetunedez_vigosos_nisibesenudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/9710319490.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/webowod.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/61623930073.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/tavuxasopubogaxedefo.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/hp_laserjet_p2035_replace_ink.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/nexofanidu.pdfIn PDF document text
    • http://fowakoleviwamop.onlinewebshop.net/93875555569.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bold_san_serif_fonts.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/serakusexemigen.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_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 5144 bytes
SHA-256: c5f73b94541a93009013a1749209d1d848928e8158b9f469c415712bc1a00aba
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 11580 bytes
SHA-256: 895573e9ab8e5493955ce53738c71e277c6f5b56a58105e304fc69cd7dca0074

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