Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df7f3f81e231c93…

MALICIOUS

PDF

94.5 KB Created: 2021-03-10 01:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 45b17aa04807d14d6046935a24948b0d SHA-1: 35b876ad79838b13df2a0f7c6562e7ad96fc1e8d SHA-256: 1df7f3f81e231c935f9ebcbbbaf56fc00d1ec32aaddd83bfc23759fe86ffb9d3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious code. The presence of numerous external URLs, including one pointing to 'maypoin.ru', suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=backbone+js+tutorial+for+beginners+with+examples+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379473/normal_5ff6b46a5b389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5fe81df2f272e.pdfIn PDF document text
    • https://wariraxaluxar.weebly.com/uploads/1/3/3/9/133986847/towalofet-mujototuwikaju-xulok-jalukawab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_6046c75f5891a.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/how_to_adjust_a_carburetor_on_a_2_stroke_engine.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/26303261777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381094/normal_5fedd6189fd91.pdfIn PDF document text
    • https://lakaporizad.weebly.com/uploads/1/3/4/2/134234628/renawerowudewanelebu.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/rugadupesetazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5fc9f9262ae26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478947/normal_60351b4923864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_5ff6b0c75befd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450048/normal_5fe53921ce319.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/03914b7e-fbd6-45a7-90ae-aef6fc6e5ea1/jawemujewijovo.pdfIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_9ab1614b262545918a5b0c740c0ee6cc.pdf?index=trueIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_4878b35877514c8d87c3ae19007c3d5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2853032f-5406-4db1-acce-6ae2c7601af0/maneuvering_board_lessons.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_29f52ff48beb465f9e24be9ea77113e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1311ea7d-b290-4f98-96d8-a89d1a6fbbbd/if_you_roll_doubles_in_jail_in_monopoly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445e85d8-5929-461b-a5a5-06f119cb2ebc/48679383611.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_485621579fdb4a388b05a1df469e3415.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_89d0e9e5b95c4f098997c80a0f95c96b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0773daec-350a-4bbc-b55f-0c78e862b712/1100_words_you_need_to_know_audio_cd_free_download.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_off00012424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12424 6060 bytes
SHA-256: a6d05c8e30f4c3bf9679b4886f50fc9c2b0c825ee664afdf6b2021f2789f642d
font_01_sfnt_off000138b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B0 16432 bytes
SHA-256: 6fc182c00767f8c7cdc9ed7a3f0722f05086ff3376ab42e80e6772efacd7b9d7

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