Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa966e9572862cb…

MALICIOUS

PDF

76.2 KB Created: 2021-06-27 19:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49e66fa3aeda0b12db2103f7018e583b SHA-1: 2e966df4c15e8313d25572ccd197ff482faf7173 SHA-256: 3fa966e9572862cbc4f45641c7d4b5e90b38f1ad007b58c7a4e97111ca136b9c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely used to host phishing pages or distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=genre+analysis+english+in+academic+and+research+settings+pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a134cc74df---tevosozup.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af997c2b028---81617479090.pdf
    • https://actorconseil.com/files/file/nodopix.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789d45d02dd---65356279367.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f257cbfd7---xuketuvakiboluko.pdf
    • https://ludifrance.fr/userfiles/file/36878247565.pdf
    • https://aydin-elektrik.com/resimler/files/vulalidozelid.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb53b95c6a0---24472991113.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea5ef11fa---jafadezonoluju.pdf
    • http://sgyscom.com/upload_fck/file/2021-6-20/20210620005859599342.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8008da269---2091343828.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16095fcf250651---32638805167.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/f12edc44bd712f24df38185b8d364485/90306492447.pdf
    • http://baohanhranghm.com/upload/img/files/zofaxif.pdf
    • http://www.infos-lentilles-de-contact.com/images-sites/files/medivaxalibivelu.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b874767d12---47206106187.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/reduwove.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/goboburexidijiruminoxewuj.pdf
    • http://robertoantoniz.com/resources/original/file/62588595902.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/eo56vdu40o3fk4351ld7mq2lmo/45498750729.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e8430161---purilut.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6957314e6---bakebipobozoxufekuvapak.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/hl8bjmv1qkuud9nqgcnl79huua/26777524330.pdf
    • 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_off0000c6f0.bin
dd7928d0cfc7840a43f550fabac6185fa584b1629f3dcfefddf0e99f89b2200e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F0 16284 bytes
font_01_sfnt_off0000f14a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 16792 bytes
font_02_sfnt_off00010961.bin
c5bf02973d75ed3b192d3e13c591d9b30d99309cf546f9b43e0f00ee416298e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10961 11100 bytes