Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5567f1c83de76e…

MALICIOUS

PDF

75.9 KB Created: 2021-09-14 22:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 87e2b92c194825920fe4e4c0f149b52e SHA-1: cc8b7b2dff5639167ad4ee3f2656e93309d86367 SHA-256: ac5567f1c83de76ec30aa65d3cd570a50f19c5b86a23e98cf1d8e0087d28853c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to numerous compromised websites and disposable hosting, a common tactic for phishing or distributing malware. The presence of external URIs and a link farm suggests an attempt to redirect the user to malicious content, likely involving JavaScript execution within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://pixomot.ru/uplcv?utm_term=pleading+face+emoji+in+android PDF link annotation
    • https://eco-translation.ca/upload/editor/file/rasubolezom.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/sabapegakibotedizomobo.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/rajaduxexuketasat.pdfIn PDF document text
    • https://estoniapools.com/contents/files/25648111609.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/75611804110.pdfIn PDF document text
    • http://kco.su/userfiles/file/pulugitarinoz.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbe0681572---66983614955.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/rerim.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/19172491761.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/de3s36bicssirhtididm53clr5/wowotolijabuvimazaj.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/46036417795.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/6736209996.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/85865586140.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408c991ebc0---72589408803.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/zujozizifig.pdfIn PDF document text
    • https://southafricapools.com/contents/files/samegofitapifajiba.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/45828555821.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/molejugip.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/36551431097.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/kelorasumu.pdfIn PDF document text
    • https://promise-land.com/upload/file/56389574585.pdfIn PDF document text
    • https://irantruck.ir/data/file/28324449023.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/88280955584.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/novonujogogakugezu.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/18013862782.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/iq5av4a2ur73703hu87qs4jpm6/9110791611.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC9 10684 bytes
SHA-256: 7fec4e8fbab8593da16d24eaceb81d54530afb368a858a98731baeec9c699489
font_01_sfnt_off0000d3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 20184 bytes
SHA-256: a3ae6d61a69b3e11265621efcbc61887c958be54186ed78edef4acb13c6ed6fd

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