Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eb1f4246d7970f…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 17:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 803f3f1a3849329268b85d595a1a2df0 SHA-1: 131f536e3b80d10edfcb9b423aa6d23fc3345707 SHA-256: 07eb1f4246d7970fdf5ea11717bdec65dec10f9bf6d5aa7d492a4c3a409aa0ea
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9a6a66222---vivubinupilakade.pdf In PDF document text
    • http://fertilityupdates.com/userfiles/files/85950118674.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/34151996235.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/vofokepeli.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/tulakigetepobewuzuterudes.pdfIn PDF document text
    • https://labelmarket.pl/data/file/wowigopemaj.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/zawoxumemoxowimi.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/zikezifefegojopegewoxexob.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a186b02c4---31079679608.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/zofujifojowifutuzi.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/58897120916.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/60470729620.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/29468717101.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/sitededosilerirobeni.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210912134819_1987081409.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109021001325246.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/a8793b7d516ef4129b193101ede706f4/magevulodegupotow.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/kevetugavowi.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/xasoxoxadubo.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/zonagot.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/gokimivivubosete.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/4145721228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=live+wallpaper+android+bestPDF 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_off0000d915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 18620 bytes
SHA-256: 756039d9b5d187e9f050a93f60a26e0a8434856df81b95231803ba25b07441a4
font_02_sfnt_off00012071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12071 10632 bytes
SHA-256: 591a6d5294f565c1380654fe227f43a8bf4617fbe85a7cd741e5a8f20a7de4db