Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cdc3867af10a1d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 15:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 91c8e7839b368e4a69324e27f9cce2a7 SHA-1: a71c5ecdc9c6ad49e1f0968406d14f53b66f2704 SHA-256: e5cdc3867af10a1d52c94506e2404e37213dbd2f05912d6d3b779f28e589a0fd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous links to external websites, some of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://begemot-rus.com/uploadfiles/file/2021050302383173499.pdf In PDF document text
    • https://oddluzanie.net/userfiles/file/rusaza.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a675dbf333---nabopujoturibenobovos.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/lujop.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b812fdbe88f---tafatuxaveduzenebi.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/fajojekegadofegujena.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/dl992ei1kvj25gidijq0nt05gn/67943117486.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/joxojenibojadexi.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/36c55af0b9d8599d3077d091d95ae61d/xesigokulazi.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/kirugejuvetizi.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/d831105cc2c93bbe614c675a2d2726a7/jiponolo.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/levopumovodixivosojakoju.pdfPDF link annotation
    • https://air-separation-supplier.com/d/files/meduzobuzoravipikav.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cdf2f547ea---soxusunubo.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e277a944c6d---nixinegixoroxarazezisi.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b7a586620---xasebilemegizebikuvi.pdfIn PDF document text
    • http://cocoal.com/uploads/file/98426846698.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/51076689965.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/77609586975.pdfIn PDF document text
    • http://riph.pl/userfiles/file/jomipi.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607898beb8ef2---wurite.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40c8a8de3e---75459308329.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160737fee99dc0---razuvimusum.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd7f861a7d---kadof.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/76670752944.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=stihl+028+farm+boss+manualPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 11112 bytes
SHA-256: 968961280619e638b4da45bb12b15c919026791294510e8e5e41e5f2aea7f66b
font_01_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 18328 bytes
SHA-256: fe6a25961b4261bb87d4039f73601220402d6f6b48423cea93fabcc6edc5cc3e
font_02_sfnt_off000127bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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