Malicious PDF — malware analysis report

Static analysis result for SHA-256 342a7c51f9e17605…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 00:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d51f6bb8bd1780349ee52693a4359c75 SHA-1: a9750f756cbd1f60d4e9881bf416713022b71ef9 SHA-256: 342a7c51f9e17605faa3a3c6a633c8943580c32fd425c55030e42270f4e8a9de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to lure users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/j3sifko4fp5c9mahi1m8i2bkg7/sibavojezunewotisa.pdf In PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/877b04e18ade6ba3107a9a545806d903/1304236781.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/papepopamogobot.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/nalofodolisalowarawa.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16885207ad---15452302498.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b84627440---50994867627.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/35558711193.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/h5ni1ecdkql3nbkflo1jt50025/33417141632.pdfIn PDF document text
    • http://mlight.cz/archiv/file/watopisimu.pdfIn PDF document text
    • http://intergeored.com/upload/File/83995551383.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/teai3uvre6ljo2gvodj0eem2vg/rirazesafojogewasoja.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f4fa6fc87---jolowexiximilikavaz.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/zexujetafodepajirawotud.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3bdb361f6571794e9c5bbfa411ca0fdc/savunoza.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/4ff46687622a75105a8a18e26ff0277b/dapafa.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/2050694270.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/12abb2286e90aa7ea87c08a7bedecc58/86652805009.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/kegizovod.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f8a671fb---57914050624.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5b618c26---fagutaliliva.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/43210590449.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/b79fcfb1b3f3c5250a8efc251919c8ad/vilevulukas.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/juwumiratatubiko.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/97257908076.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/87370991132.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=little+guy+tagPDF 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_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 9960 bytes
SHA-256: feed72e7e8297091743352579c30c6126853eeaff44896dd12f2cd7b40d9b8b7
font_01_sfnt_off0000ff78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001178a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 18852 bytes
SHA-256: b6239a5345a51d0672f2dcdc05ee3976dc7d0300763bf35cfbbbdccef48f6490