Malicious PDF — malware analysis report

Static analysis result for SHA-256 008d1e41fe0272d3…

MALICIOUS

PDF

86.6 KB Created: 2021-09-08 07:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fdde097bd850c36fac4231d9651b033e SHA-1: 6a1a8e6891048def9aeb2ca9e17bae509b7dc5f1 SHA-256: 008d1e41fe0272d3439f9473af9c83ebd13c268b61eb0679f5f19ec5504d850b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=etiquette+rules+for+ladies+pdf PDF link annotation
    • http://billcolletterealtor.com/clients/e/ef/efe7172bdc9c6addedf700543cb5cb37/File/97701390126.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee6d12bd17---96183680710.pdfIn PDF document text
    • http://pronobile.de/catalog/file/zuxojopobelobozowuruf.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070e8b957f06---bogar.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/42b477fc5424b3d8abb4d15dcc66b1d7/8144428583.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11a9ccbeec---87408789014.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/68409066038.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/fetefuju.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/9426729208.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ea3dd6458---50653082969.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/tlpodrpu52gg2mmo6u8kaaj4o5/wikowobolapesuzijuro.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/tan52hevpvbdfb6tlp8b391fs2/vonupifafi.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080033c11027---22306672629.pdfIn PDF document text
    • http://wfuchiomega.com/clients/4/46/46a815049f9cfb11ab63b386d19cdfb8/File/86046175195.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4d0294747---masipegokovorewobowakedop.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/vewaku.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/ripoperomujobuj.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210613132818.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/e4bd950234fad754ce65c1bc1cf474db/remazosibasevigigezirome.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e5da427b876---xegefanadumuxa.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/tapigisutinidozapa.pdfIn PDF document text
    • https://trexanh.net/upload/files/zegusazuze.pdfIn PDF document text
    • https://pindimana.in/uploads/file/65483978034.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/xuboj.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/30728662280.pdfIn PDF document text
    • 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_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 18708 bytes
SHA-256: 9aeefff2d53a9ca83a707496b8b9b4c13e510056b6e434dbe3466e2bc94ce8fa
font_01_sfnt_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 10616 bytes
SHA-256: d72c407ff6c69301c447710c9db972ecc89bbedecaad7a88906618ed31587714
font_02_sfnt_off000134ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1