Malicious PDF — malware analysis report

Static analysis result for SHA-256 e282fae30d7be95c…

MALICIOUS

PDF

91.4 KB Created: 2021-08-07 05:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 31521edbc986698f5c4d3362d1d036b2 SHA-1: ec1ef5ba49622ef5844f843814963b8b9e8f4054 SHA-256: e282fae30d7be95ce6867a1b7acc09457b38658c30f04d61ff0663fe0b0897c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites. The primary function appears to be directing users to potentially malicious content hosted on these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://allytemp.ru/uplcv?utm_term=how+to+wrap+paracord+rod+handle
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/60a4fd8c22ca39bc1b1e6262712db1c0/96987183505.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/56uibp9s0sateme67ludrgqr34/rikobiguli.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/c68aanerlnj08ceb161ub9q9nc/16022139866.pdf
    • http://tiyuchangdi.com/upload_files/files/20210716_183005.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/55341b1b44e0ccb10ddca6c816959401/kanamixemu.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/c9f023de70da8a8c5debfcb03b9a410e/46973384355.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ekfq863p5dassferls0ms02842/busomexam.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/vrcasahn714oi1gu3hgm5rpo86/43972004723.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a014276dd9b---zukidaxevinebuputus.pdf
    • https://chiataiec.com/userfiles/Proj_Name//files/nuxaxi.pdf
    • http://ampletrekking.com/userfiles/file/nonumatapadefiduz.pdf
    • http://chiron-ventures.com/chiron/home/img/upload/files/2106211051233859373dwiu.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/29f51d34c7dabdcc205079749b3e2807/48635545407.pdf
    • http://proxkimya.com/resimler/files/wuxifatagopejamugoruvo.pdf
    • http://www.stemcellhairclinic.com/files/files/gaxezawibasajopuju.pdf
    • https://bettyloupaints.com/userfiles/files/lodosifupetugosikigibas.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/1865bf1c69c106857da8df6ef5074ca4/tefasozukobepivutup.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/1a1e13e2f3fdfdf9d86ad597c608ec4d/jejapigovanozifopeka.pdf
    • https://onwater.my/uploads/file/37176692859.pdf
    • https://rotitelor.com/contents//files/xumuxamijuxumexipina.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/f474486b506985d157300655e1d54c37/43735350.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077f2bcbccee---bijovefet.pdf
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/najudoxusikorabezalojowo.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/d17b8f576b6e041d76e939fe63726e5c/75029696958.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_off000102a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 16792 bytes
font_01_sfnt_off00011ab9.bin
65beb0319c051c7ece4a28be591b0982c6019878b308e76f8debf1b3d1a1e88b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB9 10428 bytes
font_02_sfnt_off0001324b.bin
c20466e4e8144614630cf18f1b0da62d925184934d305f8457042f44aa11b17a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1324B 17404 bytes