Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ae4ee1e93083b0…

MALICIOUS

PDF

77.5 KB Created: 2021-02-26 11:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 85ea972e705ebe29833e9bf1ed599683 SHA-1: 6bd9df470d78ace085575462ce7663468bdf187a SHA-256: f2ae4ee1e93083b0fbb9a36e8537e580f3071245c1e5ee366b1175571bfbacff
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. This URL, https://pelibifir.ru/award?keyword=korean+language+translation+in+english+alphabet, is likely used to redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=korean+language+translation+in+english+alphabet PDF link annotation
    • http://bitcoins-profits.com/how_computer_networks_works_step_by_steph8ovx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415526/normal_5fcbd6b397d3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5ff53fdd7fec5.pdfIn PDF document text
    • http://optamorem.com/33580337253vjzme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490266/normal_602cfa69aa0c8.pdfIn PDF document text
    • http://gramnews.xyz/liribifokamizukamew3juv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fc7f0bfb756d.pdfIn PDF document text
    • http://like-store.site/unlock_code_for_samsung_galaxy_s5_freeiipby.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/puretulenuza/12431090917.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/49032783409.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/42001592307.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/secret_video_recorder_free_apk.pdfIn PDF document text
    • http://fulariponazaget.epizy.com/oklahoma_cdl_tanker_practice_test.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/nuxodadekiwinoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/liquidation_value_appraisal_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/sc_st_prevention_of_atrocities_act.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/grandstream_ht802_auto_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/what_is_dog_man_book_10_called.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/67836336787.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_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 5192 bytes
SHA-256: b8c09ec4d4aef776febd8f5610902da6b1298b40db9d0a169cc1184da0bfa5a7
font_01_sfnt_off00010555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 10284 bytes
SHA-256: 0884296a4517a243d2d046154957553b5e8403b0a59a2e75a74140b98a0b619f

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