Malicious PDF — malware analysis report

Static analysis result for SHA-256 d252074c964125cc…

MALICIOUS

PDF

80.6 KB Created: 2021-09-06 18:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9ba6fb7a79c2e0fb42e52213f50cf787 SHA-1: 4a4fea0d742a73caf9ee05942fc7240d451b0ff9 SHA-256: d252074c964125cce08fcd4ea0b220efd326b36816d6505f2e924e66f0d2361a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a link farm and a lure for payment or invoice-related scams, specifically mentioning HMRC. Several URLs point to compromised WordPress sites and raw IP addresses, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://marleenjansen.nl/images/uploadfiles/deselokalojokesux.pdf In PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b7a3ff2f2d8a8ab6354084b828b9f3a6/loloregizebos.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2oa588uqibm3pq57hk4s65r8qb/tuxabofonaxebeturariluf.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/58kq8hilq24paiioj4occnj6mi/61721932461.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/97242606317.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/supekijufunuvibikobiwopo.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/varitagilokisivetidonak.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e1f2b2dbbe4e6c8b3481f457a5ec3357/jajagomaxo.pdfIn PDF document text
    • http://195exim.com/datas/files/lozajafuxugimexu.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/tepunusuwatowozapotig.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/22361520304.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d5d4c6a54---xajidepodetitef.pdfIn PDF document text
    • http://apicn.net/upload/files/68659870488.pdfIn PDF document text
    • http://dztechfin.com/upload/file///xalibuja.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/wesilosozuzagawifofugamo.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/kepovobaduk.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210906074655.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/jikixibarogobivi.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/7geelcc81enre6j8jtm0a9sph7/zivezumogaga.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/88487099896.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe975e72c7---nadopefixiroxuro.pdfPDF link annotation
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607804f324565---41096093841.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/5024df5dc23185decdf116f80dae99b7/zudimatax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=hmrc+self+assessment+claims+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_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 16412 bytes
SHA-256: 1e109700d7e11766cc6a71da73a157a4802b9fd23ac8d4fe762c8d80b60c3edf
font_01_sfnt_off00010555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 10468 bytes
SHA-256: c571a9127b8eb48cc4ffc8945344d267247440c0a9457f7e42b66f6c3e31df60

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