Malicious PDF — malware analysis report

Static analysis result for SHA-256 375ebc718a8bdadf…

MALICIOUS

PDF

90.9 KB Created: 2021-08-20 09:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 27710e6c1c02c84aadc53045e8b4fcbc SHA-1: 6cd308f93823ab1cdf7d3a7c4b61289a81840a98 SHA-256: 375ebc718a8bdadf5246fe65d0ea73944ad611fe38abc41cbe3347fb27a7adc6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://0900107678.com/upload/file/17100501270.pdf In PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/gifizewivajumopok.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f128976d6a---vonibenaberedirije.pdfIn PDF document text
    • http://haai.org/upload/file/ferifelukal.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/73279357492.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/81635404047.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/35277659255.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/38ba62be64b2f2bbaad90c84345573ab/58573848847.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/45841751998.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607095427c69a---fumud.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/18446449785.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/35644693155.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/3af7bb0256458e3fd321f25a82893a30/68521354815.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/jeferodomelugoro.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/mibujazozugesaboxife.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/torajexasozafasodarejiko.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78e7b337e---51864689131.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/403ffda6cacea3b10dc24f225f5e9798/letigonijozulisopipopito.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/3juh429cbiqa2e83b0s3s16sfg/pixiboj.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/77002809260.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f85c79c0a6---kirasawevufedaten.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e43d25b271---lipejidomiwexubumeg.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021060518413135.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/3d4gf096qpqigrmcpdf12rqhg5/63652835066.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf977794e91---82808789191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=comment+vivaient+les+hommes+prehistoriquesPDF 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_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 19144 bytes
SHA-256: 164f13c4addbb5021d3ece4ab225e6271be080ee3532c3a8b258bcdcffdd0300
font_01_sfnt_off00012a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001424e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424E 10860 bytes
SHA-256: fd0ebf0b81d828e2f751b2bde233f1c3a2634c511652a181e03c0f27f3506f11

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