Malicious PDF — malware analysis report

Static analysis result for SHA-256 14efce1ff96c9263…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 04:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8601375c898825e4aa92437d4bcc706c SHA-1: f7c9c0310b405ac0f0a2951349c38d9cd0ab3829 SHA-256: 14efce1ff96c926351ef2ba2ed890b4e026c8b7b6fff42d3d58f9b5dc562a870
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely serving as a lure to download further payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://huntic.ru/uplcv?utm_term=redmi+note+9+bootloader+unlock PDF link annotation
    • https://baatco.com/ckfinder/userfiles/files/46677772108.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109100110036020.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/91461479336.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/rolikakalubinunikufejude.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/rarage.pdfIn PDF document text
    • https://matteagianotti.ch/userfiles/files/pikupatapabaferen.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/54509839509.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2ddb42512---vamumaketu.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/11531958913.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///joforufexunejerugoxep.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/rafoguvigutafana.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/f6hahjaacfu907juri1ddasao9/12525469432.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/84931429034.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161466090cf980---tuwujaxeludaviza.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/57867310309.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/zifafadogegixadovi.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7851afcc3---36090332581.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/labowulezowugemuve.pdfIn PDF document text
    • http://exim5.hu/_user/file/2121374547.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/nijosuxekawoz.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/vavadatexeloxoduxu.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/sirejarot.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7313c3cce---vidojajef.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/gukirixutowosebatexi.pdfIn PDF document text
    • 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_off0000d39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 10908 bytes
SHA-256: 0e540e63a622cefe1e84fe068cff7f65d08adaeb401b7cce0a74d1581e913663
font_01_sfnt_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 17356 bytes
SHA-256: 09db6f5f9bdfdec2622f3be7405f13dbd8bdb61d3f5eb0f5388f8813eb4387c0
font_02_sfnt_off000119d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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