Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f41a37d9fb5224…

MALICIOUS

PDF

99.3 KB Created: 2021-03-15 01:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 93757cf04beb916a0d23bd0bfb4f79e9 SHA-1: 351e19e9d7c3cd4bbee0c78266b0428f2a4b8147 SHA-256: 68f41a37d9fb522463863ed55842b458f7303e2bfcaea7e2579c8a7ef9db5673
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary lure appears to be a search result for 'medusa mitologia griega pdf', suggesting a phishing or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

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 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://xezojetit.ru/award?keyword=medusa+mitologia+griega+pdf PDF link annotation
    • http://wurulef.22web.org/21982172624.pdfIn PDF document text
    • https://fidenuta.weebly.com/uploads/1/3/1/4/131454859/e6b4d83c7.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/j0idhea/mamokotofifafiwikejilivi.pdfIn PDF document text
    • https://busuguzokiw.weebly.com/uploads/1/3/1/4/131406797/5e5d81234.pdfIn PDF document text
    • https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/1778542.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/ifaQidy/spin_the_bottle_game_download.pdfIn PDF document text
    • https://xapovakugad.weebly.com/uploads/1/3/5/3/135393008/pokemuwope.pdfIn PDF document text
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/fenuwemegudekol.pdfIn PDF document text
    • http://rodopigigixodak.iblogger.org/cerebral_palsy_types.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/xoxujuzetudena-gofanunanevabo-peremajet-meroxiwari.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/iejdqhb/super_shortcut_runner_3ds.pdfIn PDF document text
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/3803726.pdfIn PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/824457.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/j3e25xJ/balenciaga_shoes_track_trainers.pdfIn PDF document text
    • https://tedetoxemerul.weebly.com/uploads/1/3/5/3/135311624/lobominakupeda-relotavex-mobemososuje-jeninij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newurefaz.epizy.com/formations_avocats_sans_frontires_france.pdfIn PDF document text
    • https://591379ed-26d0-4405-baa7-5b8dadede013.filesusr.com/ugd/866ffa_11379d2a43e948c987a026f4e34d6a19.pdf?index=trueIn PDF document text
    • http://misugivunuzu.epizy.com/ahista_ahista_song_bestwap.pdfIn PDF document text
    • http://kikasipab.epizy.com/a3_isometric_paper_template.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_60d1eccf96b6479dae0a51f8b9ebc95c.pdf?index=trueIn PDF document text
    • https://313cea95-bd78-4864-9d9d-3b26c3bbe0bd.filesusr.com/ugd/2142af_5c5600280f5e4f41886c3246841b6d85.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_96c5e63086b34e55b359288c990f0a84.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_2ab37072d952458190d4f03ef0d7f951.pdf?index=trueIn PDF document text
    • http://mewexudidis.epizy.com/sugipipufi.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_off00013cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF8 5364 bytes
SHA-256: 6e5386e72c0ab9139e652e3bbec05305b771f6936e9c85c301d9696812ad0e30
font_01_sfnt_off00014f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2F 14892 bytes
SHA-256: 315c4c99f7e42b5ffb61a43dede4af1bf32e7194f0fc1dba0240639cd14fc9ee