Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d1abb3957d7087…

MALICIOUS

PDF

101.9 KB Created: 2021-07-25 02:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 44e1b92a205f27668560187f95ca33ca SHA-1: ae6b7913001a02ee1fa8a692848710f30db3c249 SHA-256: f0d1abb3957d7087ed6ef8d7b64972bdf67c3a95ed1e36307cc8f3c929db6e7f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV also identified it as malicious, likely phishing-related. The embedded URLs suggest an attempt to redirect users to download software, possibly malware, from these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://a2itsolutions.com/chop/multimedia/userfiles/file/kazupoxiwapif.pdf In PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/vuvizirikanusatitifulixa.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/aqm6faftgd6ofht883qtk70ns2/wemuropololekekonetopig.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d09c2576b09---64136412714.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/82262601182.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/71359590869.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210611/file/regulikevebogati.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160771d6176b4c---75087026467.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/vakilubipajakuzubitilikul.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210601024809.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/73133070025.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a0962ed28---64419960630.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/949eb6fbaf3b30f03ae092ab85ac5611/ratovep.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/zedomepolegomutiwu.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/a11282847d3eee47408ac1d9daa1ab95/nezezujenofimufovabas.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6cb52773ff5bcfc4c579d259bb02b45d/63350268965.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/22188370336.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/85565644451.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/a5emjad29njh32cs9fkrk6ippf/vodulepopiwuwu.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/16052284082.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/gedimiwu.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b6394a2df---valoxaxibaruna.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b49fcd5bf---6519008019.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/voxirurikojaxojijopakokot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sony+vegas+pro+13+32+bit+free+download+with+crackPDF 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_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
font_01_sfnt_off00011400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11400 11816 bytes
SHA-256: 898fa9c27dbdbc3c61c3d4b9583b9ecbe74750f726c595ca2818468a9a571e51
font_02_sfnt_off00013000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13000 32252 bytes
SHA-256: d3e1032eac2966b9edbbc56a16b889c6ba6995007943c40445a1ad3314b2e01e
font_03_sfnt_off00016ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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