Malicious PDF — malware analysis report

Static analysis result for SHA-256 084890f319e0e2a9…

MALICIOUS

PDF

62.6 KB Created: 2020-12-05 09:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9b4d1ee95168d24bda65544cef13dd5d SHA-1: 06ab01a595d5271f1146b0917096096970875381 SHA-256: 084890f319e0e2a9a289fa082b9c89fa59e461665b04a5b49275545e8fedb3e6
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a large number of external PDF links, with one suspicious URL pointing to 'traffset.ru'. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically flagging it as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?utm_term=conic+sections+pdf+download PDF link annotation
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/8010ae115b.pdfIn PDF document text
    • https://vetidemilutuzu.weebly.com/uploads/1/3/4/4/134492936/8183802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef4261e25426e1fdd5ba/1606283074946/split_canvas_prints.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15ad876-ce10-4f59-9693-7981574d36ef/my_hero_poem_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30de2bef-096e-47bb-9b72-f439237c8c50/panorama_del_antiguo_testamento_paul_benware.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6b1ffa04221c7118b33a/1606380320903/unit_1_intro_to_physical_science_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58510d49dd12447539740/t/5fcacaf5e4e49857e219e242/1607125750846/mo_creatures_mod_minecraft_1._12_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/fusuv.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/utah_statewide_warrant_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d336f36a-28bd-4bab-aa0a-1a4b5dff25e2/warogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ed20ec-242e-488e-ae89-b848ffac49b1/kagibirolarufowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40574870-ef38-46fc-a2e6-1ed14fb045bc/skyrim_vr_supersampling.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/dometic_duo_therm_quick_cool_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec955687f52b6b8145c1/t/5fc1a5879ee0f32b8790fb27/1606526344240/junuxupe.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/catalogo_jequiti_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d3f7084698658e709650/t/5fc5186e3485235c8667e96d/1606752368420/dvd_samsung_e360_manual_en_espaol.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_off0000b74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74A 5048 bytes
SHA-256: ef6a62a895a376f235c928e94f25b972c38ac59b694083880f44baabd653b8fd
font_01_sfnt_off0000c8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A2 10828 bytes
SHA-256: a45c19fc4341dbc0696b9ca3f95c8adde7488e6c2b381062c66fae4af1f3907c

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