Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cc2a47937a8cc3…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 05:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9d6d224611b2dd7174cdffc30c748d9e SHA-1: fdc52b58986d9af11d522fa21848d4f5d983cc72 SHA-256: 17cc2a47937a8cc3b2360d08944a0bdf15a963e580663b0821eca6e2a4c46245
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed for initial access via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/123?utm_term=sentence+correction+gmat+preparation+guide PDF link annotation
    • https://mepifinifiwiza.weebly.com/uploads/1/3/4/3/134334375/d74f1bb1.pdfIn PDF document text
    • https://jixusalozexifan.weebly.com/uploads/1/3/1/4/131407855/kesemake.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/HphjgeT/napapirazaxiluxelun.pdfIn PDF document text
    • http://xuvavarapegu.mywebcommunity.org/jigamudozidim.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/aerosols_download.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/bjarne_stroustrup_c_book_4th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/mazonixun/fBwBxIi/english_learning_websites_for_beginners_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/ghgBhiX/60576688722.pdfIn PDF document text
    • https://jubiporosevuzu.weebly.com/uploads/1/3/2/6/132695682/b836f76163708ff.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/gdjgjja/mystic_messenger_zen_route_day_8_phone_call.pdfIn PDF document text
    • https://fabavowugofafif.weebly.com/uploads/1/3/4/5/134591931/6347252.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaninulutinofeg.rf.gd/navuvozokajevupofe.pdfIn PDF document text
    • https://aaf8962b-2ea5-4403-bfea-7c32f2b3f77e.filesusr.com/ugd/8f3a65_ef1bcc927fd14edb896c9b6c680487d7.pdf?index=trueIn PDF document text
    • http://jovulotako.rf.gd/the_canterbury_tales_introduction_guide.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/75512141242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2ed12a-3033-4361-8c95-fd49f2f8df3a/why_wont_hp_easy_scan_work.pdfIn PDF document text
    • http://topawod.epizy.com/enlaces_intermoleculares_del_agua.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_a30711ff5ad04ca89d182f7d4d721d1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4309bf-f5fb-4d41-8b55-bb272da847a0/impresora_hp_color_laserjet_cp1215_manual.pdfIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_c11c9ff2127b4566b55e7003f8b10d5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6c5c85-c1b3-43e6-a2c7-53c80034c655/roland_spd_11_pad_price.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_f59725bfdec4440a8c7a353be5183c1d.pdf?index=trueIn 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_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 5284 bytes
SHA-256: 83c9136a9904bc78649eadf905c3fce45f6969590ecfd9ca0a5311d9918a0a2b
font_01_sfnt_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 11308 bytes
SHA-256: 5ab0616ce713cf74b1295527c5ac3af1d494cee339389de5bb407cff4dc5d356