Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2d4d85d386ba07…

MALICIOUS

PDF

95.4 KB Created: 2021-07-14 02:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6850fbe3d09f276f901044b7a7f44262 SHA-1: 5a728e36b7beb9e6f9cc872870c9274b8d4011f2 SHA-256: 1c2d4d85d386ba07377a3d63983688bc83af87bfbb317ce03ce8f004fcba5713
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The presence of these link farms suggests a phishing or credential harvesting campaign, or an attempt to redirect users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://crewmak.ru/uplcv?utm_term=plumose+structure+geology
    • https://ntpuvoice.com/ckfinder/userfiles/files/49441563855.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/fae419afa2db74aff0ea4aaa9dd05bda/xibukutevademitegalawimiv.pdf
    • http://ty-universe.com/image/files/20210622_152410.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2191f08cf---90678714004.pdf
    • https://baatco.com/ckfinder/userfiles/files/mupusuriwelerolaxeninubaz.pdf
    • http://naturabliskociebie.pl/userfiles/file/fakojajopusurulivupidewo.pdf
    • https://diedacorporation.net/freesiafiles/file/45473175627.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ntqr7atohke76ct4pl82vdqkt5/52511183322.pdf
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dimesedajufunagel.pdf
    • http://eko-inwest.eu/upload/file/zaxuz.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5649118e6cb7560264efc60601e563b0/36642097762.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6c697559b---kerajosubifowurikinifu.pdf
    • http://veivel.com/userfiles/file/24463516023.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9c28e37e7---47165056496.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/nqb58c4rfrvgucbq1rur57h8of/miwabewepesebif.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd0c2626ae---manunod.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d1a91e738---73449004601.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/092642376db0e9ecc01c400948567646/woxebevazovetitep.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/263212ed507b9846058f074e58023970/pobojenu.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/effbac3d2b4e90770b14f879dcf16cd4/wedumu.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/1d57ad4fcffcfb0c1e820abd66684238/65720971713.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_off00011107.bin
8a038774214b4b6b71c1c1c0648497cc5188a80050c39061575fa9dbb531541d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 19340 bytes
font_01_sfnt_off000140cf.bin
659aef87edc7c6e28e327c46e713ac1fc435e546f9f44323c3d5ea48f1984875
pdf-font-stream PDF embedded font (sfnt) at offset 0x140CF 10432 bytes
font_02_sfnt_off000158a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x158A2 16792 bytes