Malicious PDF — malware analysis report

Static analysis result for SHA-256 14035a6d788f25f1…

MALICIOUS

PDF

72.0 KB Created: 2021-05-21 23:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bc42001dc1bb7ce4360443fb09d8260 SHA-1: 1334abf69abc48704d6dede49b728c05c28b2e62 SHA-256: 14035a6d788f25f1714861541d6dab07b0f0d0055e6f861a772c99bf55e0850b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that directs users to a site offering a "Redemption manual 4.5 pdf free download". This URL is highly suspicious and likely leads to the download of a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=redemption+manual+4.5+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fdad02ab6008.pdf
    • https://cdn-cms.f-static.net/uploads/4494674/normal_604621b627ae0.pdf
    • https://cdn-cms.f-static.net/uploads/4446635/normal_603a58daa7624.pdf
    • https://static.s123-cdn-static.com/uploads/4412582/normal_5fee6b9d053a7.pdf
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fde75a36afc4.pdf
    • https://cdn-cms.f-static.net/uploads/4478422/normal_6051edac97484.pdf
    • https://cdn-cms.f-static.net/uploads/4456391/normal_605ee1a0a953c.pdf
    • https://static.s123-cdn-static.com/uploads/4447878/normal_5ff6bf9222d20.pdf
    • https://cdn-cms.f-static.net/uploads/4458622/normal_60312a4db700e.pdf
    • https://cdn-cms.f-static.net/uploads/4458622/normal_602b6bd728095.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a29592c-e91e-4e3a-8bbb-58a4ee97da3c/81728798386.pdf
    • https://uploads.strikinglycdn.com/files/f68ec641-7f7d-4af5-bf7a-1a912a06933a/how_to_interview_a_new_tarot_deck.pdf
    • https://uploads.strikinglycdn.com/files/c984a015-fe81-4cdc-9a31-84783bf0b5f6/avaya_one-x_communicator_centralized_administration_tool_guide.pdf
    • https://uploads.strikinglycdn.com/files/426580a4-2181-451f-bed4-1743d8f45a4b/does_wireless_dog_fence_work_on_hills.pdf
    • https://s3.amazonaws.com/tinezedu/hoover_windtunnel_air_lite_corded_upright_vacuum_cleaner.pdf
    • https://uploads.strikinglycdn.com/files/77145557-5359-46b1-a7f7-ad168101605a/sony_hdr-as200v_full_hd_action_cam.pdf
    • https://s3.amazonaws.com/tuxalowafokuvo/41157819842.pdf
    • https://uploads.strikinglycdn.com/files/62589db5-5ef7-41bb-ad85-aa7de003aa8c/kalexu.pdf
    • https://s3.amazonaws.com/povodijirig/motez.pdf
    • https://s3.amazonaws.com/tazibabebamep/how_tall_is_a_john_deere_combine.pdf
    • https://s3.amazonaws.com/wemofodi/how_to_install_hp_officejet_pro_8600.pdf
    • https://uploads.strikinglycdn.com/files/0d935219-4e54-4d2a-88fd-42a046eea784/ralejizibategolarariwij.pdf
    • https://uploads.strikinglycdn.com/files/2dede358-5b48-4683-a225-8dfd0ad5af14/what_is_a_minimal_cut_set.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_off0000ddf0.bin
dc2a8a8258a1356baf4d5d6e7dff1f510f1421cd0a61a141f2e55444ccc03833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 5352 bytes
font_01_sfnt_off0000f02f.bin
30956dd72aa349b63b126da95e3afdb6eb855c94c01e6cecd20bae86590559c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 9992 bytes

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