Malicious PDF — malware analysis report

Static analysis result for SHA-256 5370d12126978da2…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 19:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a831a17fcc9a2938eeafc589e73f4aa SHA-1: 0fe6f161289fb6b0add5aadbe0a4ab0e4fa5dce8 SHA-256: 5370d12126978da2ad0a70cf69ca5b8d32b0b6aa2edc096d53bee2dd0a2102cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via a link farm. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://mazdooradda.com/userfiles/file/finawomufagavakutujin.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a04d3e7c338---55734880930.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ca578e473970eb20a33d59b07575a883/52877276175.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6076c1960febab75881419bc334b2438/87173827533.pdf
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/vogudeka.pdf
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/65010392219.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161266d8e7a2ee---56185751951.pdf
    • http://uptownfallschurch.com/uploads/files/gunetidazupikur.pdf
    • http://svarovani-tig.cz/userfiles/file/73441023423.pdf
    • http://facilitymanagementassociates.com/survey/userfiles/files/41546864837.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/b36ed5a76141763b1f3174ffa532a838/jipurexepusu.pdf
    • http://lacasedescaraibes.fr/file/xunorirajapiseviwemipo.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/q92367s9huv77prqmi144cbso2/wixofizawudejaluwim.pdf
    • http://odpadykj.cz/UserFiles/File/molefizalobidujixudomez.pdf
    • https://juhaszautovill.hu/userfiles/file/76890321270.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b81efb05---jebuj.pdf
    • http://canphantich.net/Images_upload/files/33108623561.pdf
    • https://anjingliar.com/contents//files/fuxasukokobedekugunow.pdf
    • http://sutphinsgermanshepherds.com/clients/21958/File/55158083580.pdf
    • https://epiphanych.com/images/file/87451456779.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160873ab9b3848---30652256960.pdf
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/lexegerabuxagewiboxemobu.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ada7c00438---80444083070.pdf
    • http://curry-box-deluxe.de/userfiles/file/kedarev.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=advanced+business+english+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_off0000d62a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 16792 bytes
font_01_sfnt_off0000ee41.bin
d6b163a6e9b794968fd29d550fb0bdddcebf9084f38630c4ef1912cc86513052
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 10868 bytes
font_02_sfnt_off000106e4.bin
95b98c71d9d1251270ae2ac1c467b3299da2a8b8b4149ab812e887388502215a
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 17504 bytes