Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40f54fcb7719f32…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 05:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ddfb358145da3cce5f4475cb93a123ce SHA-1: e695050ec83ac3e229ceae8a98ba54a60f14dc77 SHA-256: f40f54fcb7719f32a3c8d13b4cffa7de3020c6dfb81d4d236d24f392dcb8be51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious and likely phishing-related. It contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://petra-dario.info/upload/datoteke/56542173222.pdf In PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/noikjhsm6d5ll43s2jehrqgtbj/52609531266.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/30113770340.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b946a6775e8---71623511922.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/dde347d16b9b52c988633bce71689bd8/43589987426.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/2fcced3a8ebfc4c22cfd1a15405328aa/98780350466.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/92737632973.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a4fbe7dfce2d8e4ac3fb14c699f770c1/81477895818.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121f97e169cc---26849686170.pdfIn PDF document text
    • http://www.moyekolodin.com/files/wowifavu.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/7618219269.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/dosapudanujosi.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210726_35C1D92CF0740170.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f19ae0aa775e966421775714b0729624/buzifuvav.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a52c993f6b---mapobelasisudukimaxazeno.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/en6vbb45s6vfnt2fc3vrac5pvs/4273753692.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823910353ec---70996562088.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/setigobujudifotowase.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/95179914951.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/palatogejujaberi.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae12652ce---86065512225.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088827a28343---tedujigajewuwafibajaz.pdfIn PDF document text
    • http://tercovci.cz/files/file/suxekizap.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/topekesokakanis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ship+structural+design+pdfPDF 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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 10956 bytes
SHA-256: 7a27eb9a8cd905af8846c2686b5d62c18d70b6fcfbc3f2115811c70888162558
font_01_sfnt_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 16520 bytes
SHA-256: 717b82eb2f0bf3efc018271c788fee8e1000f95f1dee0a94440529ebb41926b0
font_02_sfnt_off0001236c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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