Malicious PDF — malware analysis report

Static analysis result for SHA-256 266c05bb34949322…

MALICIOUS

PDF

93.9 KB Created: 2021-09-04 19:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc2e4c877eec6b125e0538d09073fca7 SHA-1: c1962b805338360f5702e9ce8e37865bcc38f35a SHA-256: 266c05bb34949322e973c74022d118a1bf7513539505f1bf4a3611e1fcd469fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm or redirector. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm heuristic strongly suggest an attempt to lead users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://elijasprojekts.lv/files/file/51709764765.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/a87bamospvg0fbo3ljuo0agrr0/govokonafanolijedos.pdfIn PDF document text
    • https://loctra.net/userfiles/file/xomotodo.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9244dcc331359ffa31f5281c2353aa7c/57648220286.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/kababobikiguno.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f59e109d2---pokelufajuzuletagas.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/c8ubb867poi34epk1bvkp6iu8r/31630403553.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/kuvowigawosilap.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/96364225128.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58c5b6db1---46129513252.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2a117bd6b30a933e368c32f198fb2274/86204128085.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0e4f946ce---bivixezevewufe.pdfIn PDF document text
    • http://effektfilm.de/files/file/69947694150.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2ca58a8ce---46683543837.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/doresasoka.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/b635c2e7e909494d6059f857f2182ed1/xabigalubevita.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa434acd9a0---62860549911.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/7446fc29bb008a421c68f75645c2acde/56475145975.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/gezudamukamemeteguburaxuz.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/77685798899.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/48310913852.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2940cc4aa---zedamapazupakurotikep.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/17112571197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=%D9%83%D8%AA%D8%A8+%D8%B3%D9%8A%D8%B1%D8%A9+%D8%B0%D8%A7%D8%AA%D9%8A%D8%A9+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD192 18000 bytes
SHA-256: a0b31ff9735f42b66f40234093a045c45b447dc411807ee84240ec919219e209
font_01_sfnt_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 24640 bytes
SHA-256: e4d4704fd52067468900191b01d6d9f5327ad1c66a6da2d65f2f01f0b93bb484
font_02_sfnt_off00011947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11947 9372 bytes
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724
font_03_sfnt_off00012d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D26 23652 bytes
SHA-256: fbf3b963a43dd6ad1e829f543a195dd1c010e5c176adf60152e9f4e1fbd7291a

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