Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2f9973bc79bff8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-15 10:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 277a9d649badea96b04d8bf75b585289 SHA-1: 33e9bc331f0242fb8d1a403f8028db0ae2d12a5b SHA-256: 7a2f9973bc79bff85c8fb1744721a40bd7c5aaa1360a011c0a348c1685575225
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are hosted on compromised CMS upload directories or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anyimaker.com/upload/users/files/74290396759.pdf In PDF document text
    • http://chinalabware.net/d/files/85509765506.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/22570993706.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/56785151937.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/nekupusivetobu.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/14874834015.pdfIn PDF document text
    • http://videocycling.info/files/file/1158566456.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/baliku.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210905_A01A58EFDCC32F5F.pdfIn PDF document text
    • http://195exim.com/datas/files/22931486280.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614111574e4f0---xurudagarimafi.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/11293966808.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/sunapuw.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3716837c7---31033338801.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d7cd1796e---52931844114.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/89975055465.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/gutimosedewokasumobima.pdfIn PDF document text
    • http://chinahongji.com/d/files/41588741057.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/numixaremapusejoz.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/20240529079.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/99942788996.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/42117070579.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/72297114804.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139f10c7e47b---92584982398.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd313c79b0---gumig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=indian+idol+grand+finalePDF 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_off0000d7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 17520 bytes
SHA-256: 3b08d9135a01ac686c6ea3ab1a86dd2df06efa676507e7aa51800106e8c3fe47
font_02_sfnt_off00011d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D79 10212 bytes
SHA-256: 2703ab93e408e62881f52cec7520c2aea3c8386a731d37eb6334845b8ae6b0b2