Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae967d7b634ba97…

MALICIOUS

PDF

91.8 KB Created: 2021-07-03 15:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 587a09cc2a28637235037b81b468e53c SHA-1: a112cba3a1a7bacbcf7a8fc73d353d05782db8a8 SHA-256: fae967d7b634ba977ed7043b9a5ff2e45699056468dfbb5acefb185b20dbe025
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to compromised WordPress upload directories, indicating a link farm designed to host malicious files or redirect users to phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple distinct hosts and the use of UTM parameters in one URL further support the link farm and potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/38ca27d01e9c98ac001679064f18f310/7744792937.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df45189a3e---bokovivimigiripesego.pdf
    • http://shiksha24.com/userfiles/files/zojakidu.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d58453e87fc9c7b87bff28421552f1ee/74888763208.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608beafb6850a---56936904564.pdf
    • http://studiotecnicoprato.eu/userfiles/files/61797398109.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7t5v6kvv0hh2plr131grnnsdfd/37647840496.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb7ccbc661---xemolokadutidixudurofi.pdf
    • http://kashima.cc/userfiles/file/xonagana.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b4e6312f36b5ba4137ea7c4a6492b916/gasoviwovuvuf.pdf
    • http://nguyenthaotech.com/upload/files/bajoju.pdf
    • http://gfb.it/upload/fck/file/rojubonilo.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/gebql7gdt8ej3k8av1aqk7ahu1/30642708832.pdf
    • http://iziusb.com/userfiles//file/72472596874.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/7lknvjesuainlbsb54idhu5uer/vavenuwedopemarade.pdf
    • http://automotiveenergy.cz/userfiles/file/satutegitibedexabiramo.pdf
    • http://primaneighbors.com/userimages/49226963505.pdf
    • http://kassa.pl/userfiles/file/66028142850.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb2bd5a474---29486254974.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07686df7d0---purikunazaxodapuko.pdf
    • http://childconnect.com/swi/fckfiles//file/19219463327.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c4e160c1f5c6a0b04df618361438c564/63998065192.pdf
    • https://newtech-utm.pl/userfiles/file/kupuvadezupanefebifivo.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570b0bd928---82107949564.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2361822f46---99053093998.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c83eb32e233d14c95d9f7ce36bbe9711/bunavasemukudo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=entry+level+lawyer+jobs
    • 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_off000101b9.bin
767a8cd9f88eb38ea3293bf869c53f706e3a5099a0c08475db5959ed30ef84d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 10528 bytes
font_01_sfnt_off000119ef.bin
5518ff6936a99c2f68b68a863723f3d01fd0b8cbaa9c3d81c36a80cfc5760412
pdf-font-stream PDF embedded font (sfnt) at offset 0x119EF 17616 bytes
font_02_sfnt_off00014801.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14801 16792 bytes