Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fc7b72955d4737…

MALICIOUS

PDF

94.9 KB Created: 2021-07-02 20:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cf9a3cf200de5464481153e289e053e6 SHA-1: b4ac66d5eaaf27c2b7c8289fea528a3e26306436 SHA-256: 32fc7b72955d473774fd408da68b4f37ba4540113b080a3d373ed17892a8b375
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous URLs, many hosted on compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via a link farm. No scripts were extracted, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://drafthe.ru/uplcv?utm_term=yorkshire+pudding+mix PDF link annotation
    • http://richmediahouse.com/admin/uploads/file/45725945437.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tmdvb40de1696msmh19kmsv5j5/16638819733.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/xobuxavaxon.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/50aacded63174c84719ff9392d3be282/bobegidipu.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/fc4abb751a7daafa06750b549a4c17b7/61360170986.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/25528341184.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/naxisepunakivoviv.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/tufemejesuxojisimeted.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/pagugufujemoxetidox.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/bawanu.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b27d083984b26ff5a08f826b55585f33/87538273335.pdfIn PDF document text
    • http://envigest.cz/upload/file/xixekibakejemotonozowub.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/magamafudipawafedepiwej.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b015f00469a---74216520645.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b56711ac1---10256154692.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/nibebobodunure.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/71121910526.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/e8e5c8f46c8399ce64e1a105a03484a7/2654972261.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/un5ped6rvpunmt0i9lcue8crd1/nogupuxuwezosizukeju.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/94700194544.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e46b1cfedc---26546421602.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160985ea8cda59---doruxufide.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f10eb66e6---71383713798.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9abb2cbb4b---752246799.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8fe38c9b---60324301885.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001108d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108D 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_02_sfnt_off000126b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B1 17728 bytes
SHA-256: 3a2ea403f4dafa9106db92db55087a4fcbf10be8d8632282f46f17bbe6957984
font_03_sfnt_off0001555f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1555F 10808 bytes
SHA-256: 59176be2a786d1093989b3bc05561b67445cc2a048dca18187edc351583711c3

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