Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e65f75f247ebd2f…

MALICIOUS

PDF

117.4 KB Created: 2021-06-29 10:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: df4d8765c252595feecacad222e459e4 SHA-1: 80da9b7fbaf685b242837ebcdd142c2f64f2331b SHA-256: 2e65f75f247ebd2f92632afca345acc004b9bf9ace9e48fc458e4d089f9ab59f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to files hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it functions as a link farm, likely to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://www.kilincsweb.hu/fileok/file/49104119369.pdf In PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da58b451e6e---79529818081.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160780727e34b4---dexinodagojogam.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ece3a97964107c432393d64237355485/zuvowumugewivi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6avevc46gg86vasb6jc5ukhme5/vineroxu.pdfIn PDF document text
    • http://rubensova16.cz/files/file/meturaxanonu.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/72cd0652240a43e337982366213fdab8/11457784660.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/89eae23de7c74144a8e57314f77c1589/gubutu.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160719ce77ee65---gijosinufedozabet.pdfIn PDF document text
    • https://susta.vn/userfiles/file/bibadamesifavemev.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/7e247a49f75005e9d57543eec815e5fc/regajobuwagon.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/93408845955.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d6fb4934b6906237158bb8733a602197/gefofufiparilesom.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/e6409625c3ccaf3faeb81988025e8fa0/41454106682.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/napudedowefowikev.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/a2ps136mm8j0bteet4ek79o8pn/dimidinutivoduvan.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/09f7e0aac8a4898307b1bfd11d9ec89c/dafepululemek.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/e036015eef1f0eb9569952ffb90fc21a/31941622309.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/3858662332.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/woxeb.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/g540egv9dperfqi04tj9t16ruh/8681773994.pdfIn PDF document text
    • http://oklogistic.lv/upload/file/kezikifolefekaside.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+does+inhibit+meanPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 10500 bytes
SHA-256: 9b9a353e2314e57f3f0c5164d84233a66b0273ae51b5d6a4b6a646b857b38af5
font_01_sfnt_off00012966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12966 4156 bytes
SHA-256: 37c29063ce9bcf40beca9e772114344531d9d470009ba2bb3e6951b8627d4be1
font_02_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 23480 bytes
SHA-256: ac961401fc34805589ffca87cf582dcf9f3d29ef4747cc2d3a6c7f98adba7351
font_03_sfnt_off00016560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16560 31128 bytes
SHA-256: 7cecbe2a13f09a9d90fdc21f472b0a1c37a466ff5e7ff1195386da4a3f82bdcb
font_04_sfnt_off0001ade0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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