Malicious PDF — malware analysis report

Static analysis result for SHA-256 02af04148bdd740c…

MALICIOUS

PDF

86.8 KB Created: 2021-07-18 07:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f381fd9197a36b14db6cda62b69f9309 SHA-1: 9f64fd7a9ee2d4a999b611668857982ee9fd4ddb SHA-256: 02af04148bdd740c8f6a8927ce65918fd00c1bd766f7fdc2427743b8ff840e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous unknown URLs, many hosted on compromised or disposable domains. The presence of external URI heuristics suggests the document is designed to redirect users to these potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/lunuvu.pdf
    • https://pjkconstruction.ca/images/file/60787701599.pdf
    • http://austria-ex.com/images/blog//file/64354437462.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/a67b3d02f22eb5aded51f6c7cadae897/45364931874.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/beremir.pdf
    • https://vegan-eshop.cz/data/file/63556752606.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a451d7f306e---39649426884.pdf
    • http://chinamakina.com/userfiles/file/jogokagofas.pdf
    • http://sun-eko.eu/files/file/51745305128.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097ce77ecd41---mexavorufupileso.pdf
    • http://csc010.com/userfiles/file/20210621050752_c6ah1o.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898cdb14329---sipefapejuwivodo.pdf
    • http://opakowania-loga.pl/zdjecia/fotki/file/wipizo.pdf
    • https://aronabritcan.com/userfiles/file/77848864439.pdf
    • http://www.celso.org/download/dobaxonuwev.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b0352654b---bopufutidiwuxek.pdf
    • http://medical-1669.com/userfiles/files/62947258497.pdf
    • https://brianhigbielaw.com/UserFiles/file/tadefopigo.pdf
    • http://zetrade.cz/userfiles/file/rofexawozesemanasisaxo.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c1553e5b7---30682807206.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160736c1412903---29070368797.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f287461985a---825379763.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac181516b6f---92928629951.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c29094070152c1f8ce9eab71d04b6a85/wuzirazisevox.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=map+of+the+world+download+pdf
    • http://pro.ovh.net/~tribuene/images/banque/file/werelezapeviligifub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f2.bin
913d240c1098db18ebafd818a2427df52271771c70fc80d9a1feca4b345b25f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 10412 bytes
font_01_sfnt_off0001088a.bin
3567f940ac8b2c81fb8c59fb3b244f9bd9726ff57b5b622102b9021cd0c963b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 17296 bytes
font_02_sfnt_off000135c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135C8 16792 bytes