Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d12e69b88c92542…

MALICIOUS

PDF

116.8 KB Created: 2021-07-16 00:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: adc69069d44c6f0c54cf56bfdaf05f01 SHA-1: 709dc4fce69d1e8e8019d117689e852e888f59d6 SHA-256: 7d12e69b88c9254295f523d2baff79b1ad397936abaf36e43963ad6784f14a71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm or distribution point. Heuristics and ClamAV detection confirm its malicious nature, likely as a phishing or malware distribution vector. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/09263129e9ad7c8852c2906f614f30f8/besiporiko.pdf In PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0faa882c4f---176430437.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/82086620964.pdfIn PDF document text
    • http://hephatha100.com/clients/4/45/452f9a9cd3514f90eb92b3b4734a1f1d/File/sovakizikikuruxedajifuxa.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/4146d2tqbqlcorhg712go4ds97/nixazekuxuvavisi.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/12d370e9f98c38ee82b54768b30d82ac/xasomofesafusitupebunamaj.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160796a9c0cea3---24497500718.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/depefunasufekikumu.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/b8t2anr01e60lhs6rhjsjgsjjr/kadesotepafebutupekefu.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/1c6f9e3e3a68dd28f3a88cbe85e6615c/21086698712.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2b9f8831ae580c5b2c87ff3b0b602bac/zadajewiripureteseri.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c076c526f1c---44781348059.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/89400581477.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/zuxuxojenexikebeputot.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/46410938224.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cba076b9a7e---5578566934.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4daa8a25b4---46120174646.pdfIn PDF document text
    • http://afro-safari.com/upload/files/daritezuk.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/9662006549.pdfIn PDF document text
    • https://projetovm.com/uploads/files/83811131421.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/33188208866.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/19302838390.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072743bb86f1---kovivufapenume.pdfIn PDF document text
    • http://nova-auto.com/upload/mujux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=thank+you+lord+for+your+guidance+and+protectionPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001826c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1826C 16320 bytes
SHA-256: 6e21e6dce1f12f3803b94d095137d20c1df25e16dc128e1f39e8752f86e13aa8
font_02_sfnt_off0001ac8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC8B 11000 bytes
SHA-256: fed83e263d39c64a8b4549c9c95014f6b2c0d1c56dc5c988e2f8a45698bfa846

Open this report in the interactive analyzer, or submit your own file for analysis.