Malicious PDF — malware analysis report

Static analysis result for SHA-256 92203abffe308c1d…

MALICIOUS

PDF

90.1 KB Created: 2021-02-28 17:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: daf4d5509ce8c9e060a303d79b71921c SHA-1: c53cfb4bc99c3aa58b779192eaa391f62f75d334 SHA-256: 92203abffe308c1d525889d3214d602d1e3dea141e3ce2ba9484a233edc271b3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate that the document is designed to redirect users to malicious websites, likely for phishing or malware distribution.

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
  • 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://dugedepap.ru/award?keyword=millard+erickson+christian+theology+3rd+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5ffe172ca7794.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/should_i_use_a_salicylic_acid_cleanser_everyday.pdfIn PDF document text
    • http://naturalm.space/how_to_reset_garmin_s60nyw3f.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/jdgd4ie/guide_pes_2020_ps4_store.pdfIn PDF document text
    • https://mukojemugasab.weebly.com/uploads/1/3/5/3/135314074/4942903.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_5ff9c3a242d63.pdfIn PDF document text
    • https://pimoraruwozego.weebly.com/uploads/1/3/2/7/132712303/bekinajovixat-nozoviv-wigaw-tojanubi.pdfIn PDF document text
    • http://klosheff.xyz/libro_breakthrough_plus_1sf5vc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_602c87160d0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_601bb3fbcc041.pdfIn PDF document text
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/dutebuzisatuju_zaxufisoxe_simojomuxi.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/8351112.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/12279141070.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/8tji2ib/gangs_of_london_amc_episodes.pdfIn PDF document text
    • https://cdn.sqhk.co/fujikapoji/iPhbsgi/76787568520.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/6hjiicV/55227942702.pdfIn PDF document text
    • https://kuxubujokug.weebly.com/uploads/1/3/0/7/130775750/velabipezuluwu.pdfIn PDF document text
    • http://xtw2.club/james_bastien_pianoruoi8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 2872 bytes
SHA-256: 54039359e6be39c510c26923debdf4fe211c44dba2189869b1e5319af292baf4
font_01_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 5752 bytes
SHA-256: a4d13168dab6c0fdab70aa4fc3f09913c595983c6eb327ca181083a9ed01fe5b
font_02_sfnt_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 15540 bytes
SHA-256: 1035dba29bfd11734818db0b8696a309a08f3978a23c1b3da26c529bc3821c72
font_03_sfnt_off0001450e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450E 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df

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