Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c04f0e1729b6073…

MALICIOUS

PDF

85.0 KB Created: 2021-03-22 14:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f2481d603cae9994633f5dc2820f29cb SHA-1: b2b84cc31027d1a288ae993cc1f5912b1896c525 SHA-256: 2c04f0e1729b6073ccd41a37a9648900d00d24962ced34e900b48c613bf44271
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/wix?keyword=popcorn+time+apk+latest PDF link annotation
    • https://cdn.sqhk.co/poxedomeke/ihP8vjb/22002481070.pdfIn PDF document text
    • https://mogogumabes.weebly.com/uploads/1/3/4/9/134900096/vebefakomudapug.pdfIn PDF document text
    • https://kipowiginudi.weebly.com/uploads/1/3/1/3/131383469/5253899.pdfIn PDF document text
    • https://fafutetigav.weebly.com/uploads/1/3/0/7/130775448/3135282.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/ghjhphi/59096763578.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/chggcY5/kingdom_warriors_milford_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hfjcMhj/my_little_alchemy_2_cheat_sheet.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/gimuroxapazibokoraba.pdfIn PDF document text
    • http://doxedisipi.scienceontheweb.net/3533533794.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/1440346080.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/yangmingshan_national_park_map.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/bjhhhuw/ww2_airplane_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nevowimo/what_is_the_8th_harry_potter_book_about.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/asphyxiante_culture.pdfIn PDF document text
    • http://fogaweja.epizy.com/kuvitixil.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/adding_and_subtracting_fractions_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/bdm_music_full_form.pdfIn PDF document text
    • http://fakolelapokaki.epizy.com/jovotunar.pdfIn PDF document text
    • http://gizogebinide.rf.gd/63316282094.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/science_8_electromagnetic_spectrum_worksheet_answers.pdfIn PDF document text
    • http://pasulupumorowim.myartsonline.com/90117457567.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_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 5144 bytes
SHA-256: 0f3e1b83a7234cce80c8b5e51d4b0e4bd049de8f8a0df6d33a4c716e86f3a826
font_01_sfnt_off00010120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000109ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AE 11328 bytes
SHA-256: 7c611758d63eab4b7c8ae590e3b3de52fef74bf802d933f6f18d89fa0092c6ea
font_03_sfnt_off0001308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308D 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36