Malicious PDF — malware analysis report

Static analysis result for SHA-256 22902ff0934d766c…

MALICIOUS

PDF

83.4 KB Created: 2021-08-18 18:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fadb15a18cd2235636aa51b65c2ad898 SHA-1: b1b9a27f37660a917463cc1f725efbe60499eade SHA-256: 22902ff0934d766c68412ea39bfee9a5fc4e3d28d4765882e9f82a50de6e9064
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 or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/79511022701.pdf In PDF document text
    • http://tubietelbar.hu/uploadfile/16782859592.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/topumotifolaguw.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/wadewilewizenilirodokib.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22749a1dbf---wuzuwubigezelufiv.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/nbloot4oiba9ee5oq09hb0b1td/masukawazezumu.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdddc075c9---99141162560.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607262ce5ec8a---83654468318.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f8c298311f06c7c5e588f00941efcc2/79672154397.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/xelizonifafukejaneterasod.pdfIn PDF document text
    • http://goldmustang.com/files/files/2837961044.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3b0cbbbc4---kuvodufuvul.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/lepivag.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadc5e2d93---zowadomebobofegafa.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/85571276405.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/zafigaxojadikigu.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c072b158d---56983932673.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/55840543918.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/20gqd1vc1651m1l096a51f5oi0/nugujuliw.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/fitodaxokifuzawamur.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/fa7b5d434bab7aef9a5a6c496a9dd89b/kawewoluzaxafin.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/l37gemva05kd0hep92n9tknis3/16464327013.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/gevewesufirarem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=oraciones+con+sujeto+predicado+verbo+articulo+sustantivo+y+adjetivoPDF 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_off0000dc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC95 11084 bytes
SHA-256: f503d96e2d0dc400714e01be8116e4038c3939a73b19bd39d49c92c839fe12fd
font_01_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 18224 bytes
SHA-256: a35eeb5e0291ff6d5b7efc12d24ce7dbb48c8c5bf9783c06f691c0fc8ac9e74d
font_02_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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