Malicious PDF — malware analysis report

Static analysis result for SHA-256 c340fa07bd2bafff…

MALICIOUS

PDF

88.8 KB Created: 2021-04-05 09:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b4f5450557275b78ba88d37d83b8b091 SHA-1: 955b5155bec28c7333ae0475572b00e324e5ef45 SHA-256: c340fa07bd2bafff6b89f8f47b4b3cc398ea3bbebe8b1dcda0bc2186a2a2e97d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious or phishing websites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests lures related to vocabulary lists or delivery information, aligning with common phishing tactics. The presence of external URIs and the ML classification strongly suggest a phishing or credential harvesting intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/123?utm_term=aviation+vocabulary+list+pdf PDF link annotation
    • http://pomevufe.22web.org/38677205283.pdfIn PDF document text
    • http://diferalezug.22web.org/jexerimixud.pdfIn PDF document text
    • http://websporizle3.com/how_to_make_a_timeline_in_excel_chartp0tu4.pdfIn PDF document text
    • http://jobware.pro/330866061833qk8e.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/676760838980gf4g.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/como_ser_un_buen_lider_librojmzkv.pdfIn PDF document text
    • http://kurs1.xyz/14905608299tci65.pdfIn PDF document text
    • http://copyrightviolationcenters.com/wef_global_competitiveness_report_20185bmv3.pdfIn PDF document text
    • http://gbo.guru/like_water_for_chocolate_sparknotes_chapter_10spwdv.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/three-dimensional_cartesian_coordinate_system_calculator.pdfIn PDF document text
    • http://kengoru.space/29800174470z3h40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bbc4d493-37ee-4537-803f-fd7f42a14c27/how_much_potassium_do_sweet_potatoes_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f39ede-aa07-42f9-8bdd-b9c94b38bf06/samsung_note_4_battery_price_philippines.pdfIn PDF document text
    • http://rulalovurodaf.epizy.com/replacement_parts_for_speed_queen_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b29550-8f1e-4d21-94ed-0f26c89d2835/duvalidobome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51151549-fef0-46e6-890c-8e3ad63403df/23406174784.pdfIn PDF document text
    • http://tinasixubu.epizy.com/forces_and_motion_worksheet_grade_1.pdfIn PDF document text
    • http://lafagelupuf.myartsonline.com/wokativonajarupakoreni.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/vocabulary_workshop_level_d_unit_6_antonyms_answers.pdfIn PDF document text
    • http://toxifiv.myartsonline.com/lubopub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 5204 bytes
SHA-256: 7a653fc872de6d5b8d72a7167381fb87a32f8d2a31ce492f88eaa7ebf37c1677
font_01_sfnt_off000122d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D5 10884 bytes
SHA-256: 9c9b1b1961ae0917c19a205955c5ef69cd911a58a3b8ea73bb8ec739e8c3e28b
font_02_sfnt_off000147d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.