Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f343aef6e7694b…

MALICIOUS

PDF

75.2 KB Created: 2021-09-03 22:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eb0ff0929cf0cfc5198741659038f950 SHA-1: c57716d5e5ab7cb354757e5d1ce098ed5c7f02f5 SHA-256: d2f343aef6e7694b5d72bd592f3bd6183a27da6621c05e2b983ef2d472c4ba68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing users to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d20b580586---farolelubekijesoro.pdf In PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad89061e573---51409156668.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607846f109169---zebapox.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/sezas.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/56841667820.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/1e0a46fda9d6867bea656f43dc7d1563/88171132044.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/2949138279.pdfIn PDF document text
    • http://iltorg.ru/upload/file/newizuzivid.pdfIn PDF document text
    • https://edarky.net/data/file/befuxadedomigaduner.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab01e6be86---matopufamajawagesexoropo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/o7b6fmph5a89utp940q48dvaf0/vuwuz.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/wekozizonabat.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/junabidovononukanijoma.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f5e7d758a---xufawolepumomexuw.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/12769031009.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/197fbd0b6362938e1a58f67c90f29451/59968411855.pdfIn PDF document text
    • http://sakem.org/userfiles/files/98936067656.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d714aea14a2---kusobemapisomogigaf.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d25d24496b---wonugezuwegenibuborituw.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/jikuwiwat.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/c546dd6d5a462b43765ced1b22bb0b1d/67310377541.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/85051995676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=indesit+iwsb+61051+manual+englishPDF 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_off0000bf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF81 17716 bytes
SHA-256: fe86ff42addea3f23556613a9e109da5851949c36b9c5c3ca53aa4f0f6d6220a
font_01_sfnt_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001057f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057F 11228 bytes
SHA-256: 9a28ff274b0840b87255fc1c71c6ce08a1fec581755d5604751c78b1faf501dd

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