Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c0fc662267bbb4…

MALICIOUS

PDF

89.0 KB Created: 2021-02-21 08:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 754e9e6e1904ed94acd97d6e68ab9b4c SHA-1: 0e25473602974b851f9755f105592d345c1471b7 SHA-256: e1c0fc662267bbb4226ee91d2cd22e5f764975d85f58b61f49126506f2f70728
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'The road not taken' to disguise the malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=the+road+not+taken+summary+line+by+line In PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/dajeg.pdfIn PDF document text
    • http://starkrobotics.org/dolugilusofikitaremotkz36j.pdfIn PDF document text
    • http://adminhalil.com/bmc_lumber_yard_austin_tx2onpw.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/vYWjizm/falling_fred_z_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zokoxirinuz/bghDfic/diy_carnival_ring_toss_game.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/ibiijhn/street_of_rage_2_rom_hack_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383132/normal_60032550e19c1.pdfIn PDF document text
    • http://regsenatvumen.website/dropcam_pro_user_manual4i9sd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_6019bc668eb7b.pdfIn PDF document text
    • http://fasodotujane.iblogger.org/copd_antibiotics_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/mgcijat/lep_s_world_3_mod_apk.pdfIn PDF document text
    • http://businesshelpservice.com/7487574597414sg2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_602677fc0de95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_600a4daa0171f.pdfIn PDF document text
    • http://christmas-gift.ru/questions_to_ask_couples_for_bridal_shower_gameb9dd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sawopigemon.epizy.com/beoutq_live_stream_apk.pdfIn PDF document text
    • http://fikuputo.epizy.com/kakenelorutudoxigotota.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/bronchopulmonary_segments_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/effective_communication_methods_in_the_workplace.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 4844 bytes
SHA-256: 7bf178a218bc4c3c8fa6b4697b65f05938ae9f877fa6cde9493fc6c906e2c783
font_01_sfnt_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 5320 bytes
SHA-256: 837f5785251b7fd0fd9a68cc3cf4d9a85c7832ab9a6d11ced6aa9bc746cb58ef
font_02_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 10448 bytes
SHA-256: cddd7f69a5a33e267b79ffc788b5e4276c8bfd1125bb7e49b70be4379c8bf73f
font_03_sfnt_off000140ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140FF 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e