Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bbbb1f94084e1f…

MALICIOUS

PDF

75.2 KB Created: 2021-05-29 19:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffb9dc182d146d4b2371ad5d41a2f4cf SHA-1: 2979062f13424a2b70cc3d1ad9cbfae47bf7729a SHA-256: 12bbbb1f94084e1f0db9906c6adddae2b0934af1ca354a679b3ca4956c135401
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wb?keyword=cuanto%20es%2015%20gr%20en%20cucharas
    • https://dararokipo.weebly.com/uploads/1/3/7/5/137518135/877a92abb33c.pdf
    • https://majabowuji.weebly.com/uploads/1/3/6/0/136092793/gegamegemis.pdf
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/mamawigug.pdf
    • https://cdn-cms.f-static.net/uploads/4384301/normal_600a0d65a3412.pdf
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5ff5b5dd8def3.pdf
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/gemum.pdf
    • https://cdn-cms.f-static.net/uploads/4460461/normal_601b2976e956e.pdf
    • https://cdn-cms.f-static.net/uploads/4374366/normal_603db82e156ab.pdf
    • https://fugiweritukasuj.weebly.com/uploads/1/3/4/6/134682589/junal.pdf
    • https://cdn-cms.f-static.net/uploads/4421336/normal_6019ada0870fe.pdf
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/bevejodajopeke.pdf
    • https://sijetiwiriwex.weebly.com/uploads/1/3/2/6/132683168/66ba94.pdf
    • https://kenopawubiwo.weebly.com/uploads/1/3/4/4/134459696/fuvibeziwuwamaz-xutosabiw-toxonu.pdf
    • https://sofotegepure.weebly.com/uploads/1/3/4/5/134522016/babonisad_tofawa_dogejupuwalaf.pdf
    • https://cdn-cms.f-static.net/uploads/4464327/normal_5fd3db054398b.pdf
    • https://cdn-cms.f-static.net/uploads/4466398/normal_601096a3d40ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d620a917-a1db-4be2-b12c-c47c870de8b8/93057471816.pdf
    • https://uploads.strikinglycdn.com/files/60e58d59-323f-4a66-93b3-96e435a729d6/zoletiselisaguluvonaxuk.pdf
    • https://uploads.strikinglycdn.com/files/3290ab7f-6f26-4418-ac82-16f4371c5607/data_structures_and_algorithms_in_java_goodrich_solutions.pdf
    • https://uploads.strikinglycdn.com/files/72bc224c-194f-429e-a413-962823251a3d/96175726272.pdf
    • https://uploads.strikinglycdn.com/files/b0506257-9d1f-4eac-ac5d-abcd604c1bfa/timex_weekender_chronograph_green.pdf
    • https://uploads.strikinglycdn.com/files/8c750353-3b4f-455d-b22d-d65b8f97c524/pemisujofudovagevulem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c2.bin
4834995ceeb3936015b04bb97d97fb5b11982c53a8da1c688912cb99b84871f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 5108 bytes
font_01_sfnt_off0000f625.bin
cef101d4c456e03efa7f9ddca39fb26af5d1375b1e8f032a3dbe3197ab9af595		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 12220 bytes

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