Malicious PDF — malware analysis report

Static analysis result for SHA-256 96052eee36ab37f1…

MALICIOUS

PDF

165.9 KB Created: 2021-07-03 09:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4c1b6684b867f11518cc02f0cf58a6e SHA-1: 372f320447be37594e664c3115a252608d84e7c2 SHA-256: 96052eee36ab37f19544e7827435e0bc8a126e5984754db6feb704478b3b10f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

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 https://nomylo.ru/uplcv?utm_term=five+nights+at+freddy%27s+pizzeria+location
    • https://dancleland.com/img/upload/file/jafinok.pdf
    • http://robalton.es/Albums/images/file///gepinuketufob.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/niruwaxuxedanagokefa.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8qu7btio5k6vt86q0a4gggrcqa/rewokamalotozalujexud.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/96e8647055a40936237a4d3a29f3e9f7/70750053745.pdf
    • http://nextgenship.net/upload/file/20210607162303998038.pdf
    • http://hasyo.net/files/file/kemedujokobojupagebasuto.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16080c109a008c---niwuw.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/31730840835.pdf
    • http://abnicum.com/files/file/51493545564.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adae19ed591---61192484326.pdf
    • http://apisicul.com/userfiles/files/42456749931.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5c0c4c820---57955963361.pdf
    • https://mimpiindah2.com/contents//files/60426383776.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f4d7513ea---wupejudasiboroj.pdf
    • https://people11people.com/uploads/File/2859275595.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3bf790ca5---57790876301.pdf
    • http://aucoindeshalles.fr/menu/file/gokuworezafa.pdf
    • http://nhs1980alumni.com/clients/878257/File/zuwigi.pdf
    • http://henca.com/files/details/file/bewepupebetoripurapoxuro.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5gs5kdv75189ie5c69i7oc1nc2/zojixawudakowaxole.pdf
    • http://beateromer.com/bilder/file/liwigusofugagoluper.pdf
    • http://ahlhy.com/uploads/file/291418375459.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c872d48512a---fenedametabefifamotinizi.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093dfffa0369---67620410039.pdf
    • http://irodori.kir.jp/files/file/giviros.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022377.bin
fe2ac332cb69b4e24146166fd8a68f3966723fbc7e730c8defcdc880e17cc3e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x22377 20288 bytes
font_01_sfnt_off0002578b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2578B 16792 bytes
font_02_sfnt_off00026fa2.bin
db6584eef8ee9082e99efba9571132a202ccc238df482f7b6a475ababc9a6f33
pdf-font-stream PDF embedded font (sfnt) at offset 0x26FA2 11152 bytes