Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc456c209188569…

MALICIOUS

PDF

85.4 KB Created: 2021-07-21 16:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4095d1d7d20c667ff79b1e89d6deae5d SHA-1: 38665e221c56b6271cd42d5d13f1b692c42583ea SHA-256: 6cc456c2091885695307805779083b5b541690a2e2e91bb1e7438fd2c012ebbb
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple domains, some of which appear to be compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pasarangroup1.com/contents//files/74321216248.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/gjqr7gp23cpt9efg36atia5sjc/65521447007.pdfIn PDF document text
    • https://ikima.fr/uploads/file/13369918039.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608127f8a8089---8161542513.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/91354614504.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/82204585314.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/wejopesijuvivadelelo.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/xofajidil.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/dezovuledovemut.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/mulopofozefomo.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/74209768452.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/27898436465.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/61414749659.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/17570613347.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/zepedawiwisofiresofibumip.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af76937c316---32059072175.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/31d797a1c6e0dd5f7637a5e696d41e80/mirufalut.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/girawotosebafon.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/kefebefujev.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/dajudopovedowokenobod.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/vamirapitajopo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7a9e0a7f1---doliwobamome.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/podasipewarixebonu.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mugifupikegobavopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=project+gantt+chart+examplePDF 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_off0000eb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 17008 bytes
SHA-256: 0fafce38588024a040f4556bab3139a5378033e358c00f9d1b3d997ff4da41ea
font_01_sfnt_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 10792 bytes
SHA-256: fc223ce228e5fbcb58c4d46c9384096395ba4311098309832127cebf22a1c3be
font_02_sfnt_off00012ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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