Malicious PDF — malware analysis report

Static analysis result for SHA-256 2792eb6d99516238…

MALICIOUS

PDF

85.8 KB Created: 2021-04-01 20:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 30bd911f5f8b58ffcc8b86ee6975ffc9 SHA-1: 1ecd1240bea7989c9d71ea78241afd4d1f6f482b SHA-256: 2792eb6d99516238cece6f24e83aa4f768a504291f3eae67f2eb856b7d13297f
134 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ClamAV and an ML classifier, and it contains numerous external URIs pointing to disposable domains, suggesting a link farm for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true malicious destination by using many low-reputation domains. The document body, though heavily obfuscated, contains metadata related to 'broiler management' and the wkhtmltopdf application, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/award?keyword=broiler+management+pdf PDF link annotation
    • http://pressit.fun/gta_5_psp_download_rar38map.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/fuzhfig/jarozaram.pdfIn PDF document text
    • http://faketikus.22web.org/pronunciacin_de_verbos_irregulares_en_ingls_t_d_ed.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/fijhhhf/42322278006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423429/normal_5fee646f9a77b.pdfIn PDF document text
    • http://vabademajelid.iblogger.org/martyn_lloyd_jones_sermons.pdfIn PDF document text
    • http://rixuliketasaban.mywebcommunity.org/jumakimuzozom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_5fe0359cc5e46.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/KIRYge5/7446571542.pdfIn PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/xoxosata.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/definition_of_detailed_project_reportt82rf.pdfIn PDF document text
    • https://susokeruno.weebly.com/uploads/1/3/4/6/134656617/af40751c939c.pdfIn PDF document text
    • http://pubgmobiie.com/ripelesedokubepipols8x4f.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/meaning_of_10_000_reasons_song.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/jaIgjQ6/google_assistant_without_play_store.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_5fd64d1d3a05d.pdfIn PDF document text
    • https://bonuxomudod.weebly.com/uploads/1/3/2/8/132814593/119856.pdfIn PDF document text
    • https://sukivafuxek.weebly.com/uploads/1/3/0/8/130874221/dadefutoz-siwibiberawud-bosewekopazag.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/eqAEjhp/76704858482.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/vabemabanelexonuwagesup.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
    • http://tavupovasar.rf.gd/gedipotedurateme.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/42171417270.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/rabofataworejox.pdfIn PDF document text
    • http://vujurow.rf.gd/hand_logo_vector_free.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_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 5020 bytes
SHA-256: fd6ac24c0e03439a7e173c86d4eb0e3a19261cd014c000f0a2f0b9e4e790102b
font_01_sfnt_off000115f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F2 11124 bytes
SHA-256: 00ca989120562e1c9c476c1b8b212f0f4adbfbf602aaec73b7e861675c7229e6
font_02_sfnt_off00013b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B32 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34