Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f00c537a1deb016…

MALICIOUS

PDF

76.4 KB Created: 2021-03-22 19:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: de60de5d7e7db893ed352c9bd6da0a19 SHA-1: 212af4c7e46ea68c8a6013ddc0fe8f6dd816e4df SHA-256: 2f00c537a1deb01684e20a30a44f028f868f9a5970fb1ca363bf578bb24f4ca7
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect users. The heuristic firings indicate a PDF link farm and a phishing/trojan detection by ClamAV. The document body, though heavily obfuscated, contains references to vacuum cleaner parts and the wkhtmltopdf application, likely a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://botokaw.ru/strik?utm_term=eureka+mighty+mite+3670g+corded+canister+vacuum+cleaner+parts PDF link annotation
    • http://drive4mclanemilwaukee.com/vitakinomexusosuxuwa7igha.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/jgcjagh/77817792892.pdfIn PDF document text
    • https://cdn.sqhk.co/gakilofod/eiajhXE/mepusel.pdfIn PDF document text
    • https://cdn.sqhk.co/mipemoku/geaibif/venatiloji.pdfIn PDF document text
    • http://carishr.com/43441480327zz38.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuwudedi/beUgh9H/samurai_story_ideas.pdfIn PDF document text
    • http://kersita.space/dragon_rampant_freeca018.pdfIn PDF document text
    • http://robolab.one/fibadurofovakid4bkg.pdfIn PDF document text
    • http://bumaga.bz/hampton_bay_low_voltage_300_watt_digital_transformer_manualj1ykd.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/eiihfho/salukif.pdfIn PDF document text
    • http://wellwork.site/ocd_book88i6v.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/79578280000zkiai.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/bEXlVhj/lingo_the_word_game_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/iiTgegi/dude_perfect_newest_trick_shots.pdfIn PDF document text
    • http://business-open.online/243499221277mz94.pdfIn PDF document text
    • http://sovetnik53.ru/el_budismo_sin_creenciasvp5pa.pdfIn PDF document text
    • http://potolkilife.ru/delugemave6zztq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_78b8ae3ffcbe4559b5c0e499f98f5b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/79591167808.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/choreiform_movements_rheumatic_fever.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_b241af203dda408a8713637432134a5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/invitation_template_birthday_party.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_c06c27427b8e44deb349bad9d01ade63.pdf?index=trueIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_e6ceafb9416b4c42a3b3e888288c1747.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/masokupezapewu.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/jojugaropakepovise.pdfIn PDF document text
    • https://abe99a74-823b-4c5d-85d6-f8d8de52422f.filesusr.com/ugd/73cc63_420cbcb492c74b39b64fe9b0ea5b41d7.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_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 6208 bytes
SHA-256: 18d41b22ce6f4e5feaf813bcfb3b13fa3c86ad2ceec8868c9f61472164fe2af2
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10820 bytes
SHA-256: 812a98cbd3a95ba8afa512be61d666b7d2dcd2bdb5f5685c768cc055768edd2f