Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c7a75caa99af41…

MALICIOUS

PDF

86.7 KB Created: 2021-08-02 23:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6790b0e400336f13fd838db2343b754d SHA-1: 0067529dc253c527f3c3ddf7e71f47d6d8e7c2ea SHA-256: 70c7a75caa99af412bd8c4999894596071ddc4220732d189dca5873720d79945
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable hosting. The presence of numerous links and the use of SEO-related terms in URLs suggest an attempt to manipulate search results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://gw21.ch/uploads/userfiles/file/90267813533.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/12048111df32880189f8a7aa5233ff07/lomomuvololatasomamafaji.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e0c0e4c3---tuxejopegojodojo.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/69595669370.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/nefinavo.pdfIn PDF document text
    • http://countryroadssiberianhuskies.com/clients/e/e1/e1b2222506e4b6fd6c510396e08362d3/File/89408712608.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c57b9093925be54fedcba1ec5153772f/50934109325.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160756649ba90f---vepigaxeto.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/lewoke.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/189051217760946920dcb62.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16085950e38fa9---dubuvigoxoxobomuxidumer.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/fiwapogetetedifa.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/83215689191.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/c7e2be8815afc3db58d49559de2bf582/bixepuvorexefovu.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/sevululesoxisaluzaba.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/noxawuduzizuveraludage.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/55734437070.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/39646330917.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/segijuga.pdfIn PDF document text
    • https://ijpdua.com/contents//files/ginasube.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88a6b1afc---42414379974.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/20644082975.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/458487605.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081f45137d07---22976490590.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210630_144330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=forza+horizon+2+xbox+360+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 18480 bytes
SHA-256: 8f89462bab95b6b590d9aaeb6c259de7419edf2b53127866b1dbba9821a37ed0
font_01_sfnt_off00011ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132ED 10892 bytes
SHA-256: 5ca2c1139694a61bb5dacbceb77de1664cd33aed32bc2aa8af114a149ad85575

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