Malicious PDF — malware analysis report

Static analysis result for SHA-256 03edf9ac23ff1b2e…

MALICIOUS

PDF

66.2 KB Created: 2021-01-23 12:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 15ca1b2c2136f8c159e4e062a36e73d3 SHA-1: 245bd68a60346bafb79404521aa1828245208b02 SHA-256: 03edf9ac23ff1b2e628c7459848dca396eedb55e37fcf24b6ad4be1e581a4ecb
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to a known malicious redirector. The document's structure and embedded links suggest it is designed to trick users into visiting malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the presence of numerous links indicates a strong intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=anjou+aroma+diffuser+user+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fe4d767e9c5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5fecb01879e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5fed23e8e1224.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/KhbrUdb/rainbow_stacking_toy_montessori.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/9hjrvSS/2020_election_results_arizona_recount.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/7hdggSc/dofofizofejiredif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fdf5a6e86df7.pdfIn PDF document text
    • http://vusejulene.iblogger.org/fonidisufixodiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489257/normal_6003bf95b582c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rolaxaja.rf.gd/instagram_frame_template_vector.pdfIn PDF document text
    • http://bavajozobe.epizy.com/amiga_forever_7_plus_edition.pdfIn PDF document text
    • http://nifopufu.epizy.com/ashes_cricket_2018_game_pc.pdfIn PDF document text
    • http://tumofif.rf.gd/sap_bw_basis_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/actress_linney_crossword_answer.pdfIn PDF document text
    • http://desetezovadu.epizy.com/empires_and_puzzles_level_guide.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_off0000c58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58F 5260 bytes
SHA-256: 17d6d49f06225342b17087c3dea29c44b0e5ff0efa5d9d0da87a2f4063728539
font_01_sfnt_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 10792 bytes
SHA-256: e7325d56c7735d92e97790bc92a643aa41745f3cdf54a37ea7542de1ff12b2f5

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