Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d7bb260d6cd65b…

MALICIOUS

PDF

111.3 KB Created: 2021-06-27 11:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 052aecf5e0af69f2d684905fbf8bff84 SHA-1: 2b6b9a3d24f3e5cd1e930069cf38685588bbc9fd SHA-256: 95d7bb260d6cd65bdc327316d7c37c4165a518530fd994c4ec20805f16e36e71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely intended to redirect users to phishing or malware distribution pages. The presence of embedded URLs and the nature of the heuristics strongly suggest a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=stretch+of+road
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3886c7ec0---nowaborititekomo.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ce6a3945ccb02822ceb234b1e3294b2a/tutilowisopesorexakuwupu.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a420f6c5181d2b276f05f95aaf16e95e/fidilesipixaredilojafap.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/20d2de82d1f995ed6438490d76c53ad6/xajoxugiboxupojofaboketu.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965821b4d83---60993476066.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b9073c7cd00---83639219094.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/29192431516.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d50838d4a---73587031677.pdf
    • https://protradingindia.net/userfiles/file/mixezojewewurezetomoten.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c2c5d91e1---mikoz.pdf
    • http://vstarmp.cn/upload/files/20210621_054118.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ujkuhdtq82n7asrssquepk2144/tesifuxota.pdf
    • http://bobmeetin.com/media/galleries/files/vibotijid.pdf
    • http://banghaija.com/userfiles/file/28887061765.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5d006ce9b03c7b0004c73647ca8fe774/suxudi.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/e4ff8a4b55117353846baa957f98e359/rapageraguz.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c0fdda434---7585515762.pdf
    • http://sooclose.eu/upload/File/samoz.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0280c03dc---fivuwuvibib.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075da32bc00d---rosit.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/897d256d5c9db353cbde214a6c983f78/58414624692.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ae9cade3b1f0a5d18ad6a6818614446f/39902626153.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6c9b27b8d2dd72386d8a30908c5dbc52/77608277465.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb969448ab5---dirazevadokupuketumido.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_off000154ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154FF 16792 bytes
font_01_sfnt_off00016d11.bin
d877c39673d14ef8a57f91e2e72e186d10c6e5a501159560692d619a6ba11409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D11 17040 bytes
font_02_sfnt_off00019902.bin
f5e5f305de610808cb538a595df627bbed0d6abfa07e871e0bf418f50bec2f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19902 10240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.