Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fb814452a4e944…

MALICIOUS

PDF

90.3 KB Created: 2020-12-20 20:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 44b0d851ce03692435650614a200b05f SHA-1: b36faf06552930176cfbd558ce23618e6cb17c12 SHA-256: 92fb814452a4e944eb97c3cb7e840880a0a16c04e512eb36c6dd5585238b3cf4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document that has been flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains text related to an 'Ssc admit card 2019 uttarakhand', suggesting a lure to trick users into downloading it. The presence of an external URI pointing to 'trafftec.ru' further supports the malicious intent, likely to serve a secondary payload or redirect to a phishing site.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/aws?utm_term=ssc+admit+card+2019++uttarakhand PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5fbb59d39d3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5fa038f6e7108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5f91b8ceca13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fbe9b1c902ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5fb98e4572bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8e563031311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fa32d9b69b7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eaafee-af9c-4b9c-af23-4c28e5627963/najegiratibamabuvereduvax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df72873-9570-4315-88ab-2ddc44e6bdb3/kenmore_water_softeners_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615ea874-b958-4871-a1bd-383ee4d7f623/adventist_church_manual_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e16762-b3d8-491b-bf67-4f285178ebab/sekapirufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55efad88-ca36-412d-8198-611db473ca36/four_year_anniversary_symbol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74f35e3-2f04-49dd-939d-4d042122e221/56991183071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b56568-96f2-4a23-b93b-834be49b6b5c/blue_planet_tidal_seas_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/magic_the_gathering_arena_decks_guide.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_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 5796 bytes
SHA-256: 30ff1c736e58765463686cfa0edb6583881174d8248e615757fb4943ede4e3cb
font_01_sfnt_off000136b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B4 11204 bytes
SHA-256: ea9cf3ccafc19579e48ef0e180811aeb9556fa2a1bd85dd4692e175b5dd71ae3

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