Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ed957497a8fedc…

MALICIOUS

PDF

89.7 KB Created: 2021-06-25 21:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bcf29515f0f38700c6ec0cb0b7eb726 SHA-1: 3b5799c84b57a346caa8a110961e917c966d8d86 SHA-256: 93ed957497a8fedcdc4610f5dbf3359dbaf8000a07d548c26491f1a771c33e88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=recently+present+perfect+continuous
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/snmonlhc4cghulqmmnm4tl12l0/15095618001.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/42104234467.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ceb018e92---69130091353.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/jhjhu9fvdb6ggq902g244l77r0/15047968134.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb54233d05---xetovetunodobipito.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/d5728764913f12d02f17eef062bc209c/3499241099.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cea137f50---denabajix.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607766d860a51---63165662024.pdf
    • https://soyana.de/js/ckfinder/userfiles/files/66923556537.pdf
    • https://accuratesearch.com/userfiles/file/51036571951.pdf
    • http://softwarefactory.nl/images/file/fijalopujulu.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/rrp0egsur49pbbd8aaceb4vp61/tidibesavapewetigewu.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a20119636---32501521651.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/m7hs7plov24jvrssna747nh4i7/81794214078.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/55152ee76f8bef6efb1b9745a3f0a76d/63494314072.pdf
    • https://oncetrabzon.com/resimler/files/93367280219.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a032c989f70---xobarolugoxajafelodasil.pdf
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/igm5c321fmhip88lc7t3ogmcfl/95639122979.pdf
    • https://rocksoliddesigns.biz/userfiles/file/naruxafezusiwan.pdf
    • http://esoftland.com/userfiles/file/pogexifuwimemedikoga.pdf
    • https://lawyerupsmart.com/tempimg/file/48950411997.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d334e5756---vasoselarixedij.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/ikjhj8n0dpl7p373o8ckf10656/23696924394.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_off0000f94a.bin
b90300051ee12f3bea85041cea4364f81a96d0a4fde1ea0a773d48fa7b854379
pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 18012 bytes
font_01_sfnt_off00012769.bin
6933cbcf5452d9c44ceb9e9db10c7c227ea7989e0c11523394f8a87fb69e5e09
pdf-font-stream PDF embedded font (sfnt) at offset 0x12769 10572 bytes
font_02_sfnt_off00013fb7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB7 16792 bytes