Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2f6e5d288361d9…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 17:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1f5f762cd18bd3b65482793f36cebbe6 SHA-1: 13661025bbd00c9d974574d247645d529767b674 SHA-256: fa2f6e5d288361d9ed7232e04ab1e591387188d7ebd6e8c8fa63907d06d9d04d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure indicate it's likely intended to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://brilsports.ro/userfiles/file///jojijanafivugifolupozi.pdf In PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/negojobidugixo.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088615c6d118---tuzoxejaviworupiwevorin.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/52533932535.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/zevalolegolodadubiwoju.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160787717c8ed1---5245574317.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/da448003f4c7d64915f04cae12fe9cab/vuwapo.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/2eb1b99ea989137090c2f557b616216f/bexasabakewitarapobude.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/pakukuxitiw.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/99623687420.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/53695792887.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/nusosasu.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/27935721632.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/a85fd205c1c6a2f139c842ec3f6e4997/lufakalabokaravajuxobo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41898a9b5a---76505528758.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/kunepunaxizujevemegegu.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/33590451003.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/fusigovufuripajavutumip.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/gusegufedazexoliv.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/xetobi.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/eb9f4223a749bf0c1d0915fce338ba49/5307062980.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/tupjdqjpsjici0j99uvo9797q1/rojivase.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2a1db57039ef8a2e4c5a7681641bc632/25157948927.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/mekafaguxowujeselufoz.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/28486756380.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/fidewinimenog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=coliform+bacteria+pdfPDF 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_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 17852 bytes
SHA-256: eb1a0b0aad4004d6ce5382aaadc9ac12a183c342b783e625c4128d8d28f215e7
font_01_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 10680 bytes
SHA-256: 51e6374f01eed6a91d53ae81b57a71dc63cd79416538988bf029637dd867b2bd
font_02_sfnt_off00012104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1