Malicious PDF — malware analysis report

Static analysis result for SHA-256 8322ccd8e22d6045…

MALICIOUS

PDF

103.0 KB Created: 2021-06-30 10:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ddc7d29a568a06279aacc09a759c679 SHA-1: 9eac330fc2186eda2794d01b99a365911821dbb1 SHA-256: 8322ccd8e22d6045fd31ea029cbcde2fe5c46432967a0f42662bacff06f57747
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised WordPress sites. The primary purpose appears to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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 http://www.srijonihealinghome.com/fckimages/file/wusawisijo.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/2418i2of1499j5itq3o88nep03/rurenisobowimutata.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f446233486ff348ba38615d9faa7487/826774158.pdf
    • https://thefertilizerequipment.com/d/files/61926222254.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/111b68d75914b4709d2c0bc4916be28e/74200022468.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/4cb4a0a887363f7377e683e42e87e790/belomibe.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b8b84188f1780ad000c4c64c6b73470e/97671040402.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160726c764c77d---56782021739.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85c2b0b390---muximifopuvaxizigemev.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m65taa97seduq7lsdf4vkntrl3/solezutomudapavoboguno.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac252f2667---57382660985.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e5267df125bdb2c2343432ff99d4aec9/nuveliravugaruwaveru.pdf
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/sepuzu.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5573iuqkfel73r98dt8ge4g9qu/38369366009.pdf
    • http://canadanur.com/resimler/files/jezenogepeziseko.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741f03a438b---24334466824.pdf
    • https://najlepsze-w-polsce.pl/uploads/8419541974.pdf
    • http://alimentosldm.com/userfiles/file/napejitefikila.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/6055e2fd8f5752c0728aa0878b919187/49347331657.pdf
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/nepizamev.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/jhjf2nm2ka11sea13oufod1g5m/vivutamomugesup.pdf
    • https://unique-u.biz/images/uploads/file/sesarafab.pdf
    • https://umartravel.com/files/migeruxamewobojasipef.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/rloaeeablvkgcifivdhr53inl1/takinepowukew.pdf
    • http://www.irrv.org/uploads/files/sodukozofajutib.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/nilimoz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=is+2266+wire+ropes+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_off00012c67.bin
91c106930e0fd9bd2ca6bc5ac7437640a9d49b8199f9aee7f3b12297a8f0918b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C67 10408 bytes
font_01_sfnt_off00014433.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14433 16792 bytes
font_02_sfnt_off00015c45.bin
b1cd998a30a0008462408af8d3e99d15616e1452ef59b13f82d8348c7140ac61
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C45 18408 bytes