Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc005f73d296779f…

MALICIOUS

PDF

90.3 KB Created: 2021-06-30 07:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa6f9393e83dc4ab0281d24c9e003791 SHA-1: 0e2d4cd2ce46d899ceea5900a75de6d70afca99b SHA-256: bc005f73d296779f6790fe5e7c5735c44431da7cea087bd4cd8fbd557792a735
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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 https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160780c6f34cd7---94254912159.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rpkn4og53d74p9u0aeseq9sg90/8018028346.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076c5166a001---vafetumasarozuvife.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a063330f25c---51682873609.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1af318eda---3846008562.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83ff45f3a---lemamidosukeparuveduvimo.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783f9376a24---42684349010.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef5479d016---gugejaduje.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c3a04089333928a222cf763e86d102b7/wiwumovutixapatiwonepofo.pdf
    • http://kulturazebrak.cz/userfiles/menadisowagi.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/k3sa8dl4pnb4va29lf60jc076r/43224346309.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/muresagujeri.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/58edfa643b81da606edd6aac97825d0b/rosoxukufito.pdf
    • https://rozgarnetwork.com/ckfinder/userfiles/files/95660488966.pdf
    • http://agriturismocorteerbatici.it/userfiles/files/zanuzomij.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/6ngao7upn9tnacjb79qbkrosn2/wabixuta.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/6e05f96d1de71ca5808f12faf6b8981e/70995208308.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f15cdee0---50238672074.pdf
    • http://infunplastic.com/d/files/bezazariduvuxutizug.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096539403f05---zofusujurewa.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/96026300356.pdf
    • http://paroissedementon.fr/upload/files/kaxatarege.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608248c2266e5---silalukapebime.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=may+jesus+be+with+you
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC1 16792 bytes
font_01_sfnt_off000115d3.bin
2a0a49b6c9127de31bee9d566cc58fccad8f6c0a05014b6b7414b31106ad1247
pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 17804 bytes
font_02_sfnt_off0001440c.bin
30c993c0a8ed4e4c310679f31a724c427516b09b11beb787d1c40daad5e1f005
pdf-font-stream PDF embedded font (sfnt) at offset 0x1440C 10516 bytes