Malicious PDF — malware analysis report

Static analysis result for SHA-256 d941c63fa18fee11…

MALICIOUS

PDF

96.6 KB Created: 2021-08-02 17:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b3ec24a1de9d9d0fbbe8a5081c8db3e5 SHA-1: 8d78d6f7a170b7572d68fd6cacf499ff212531cd SHA-256: d941c63fa18fee113036b4bff097437f3adaf276a137ad9001cca4dd38190ac0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, likely intended to host and distribute further malicious content. The presence of multiple unknown URLs suggests an attempt to redirect users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8da5246ca---pewewubiwirewulexe.pdf In PDF document text
    • https://ijaetis.org/ckfinder/userfiles/files/jekawexizafibon.pdfIn PDF document text
    • http://apsons.eu/files/file/lazozimewoful.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/puvotinasek.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zibalivo.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac860a852c6---92374624991.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-4/20210504044442160297.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161071b96af0c8---71448313903.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/49429003576.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f28ffe543bb---84987759685.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/89836844018.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d886a80707---7438183197.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/wujovogigurumewapere.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/buwopirulidotadidevawe.pdfIn PDF document text
    • http://www.toptehnik.si/images/88241996942.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/96318592018.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/546a80f5d95c4ac8ec967c2021b73bbb/95613064695.pdfIn PDF document text
    • http://dienmattroigiasi.com/uploads/files/vobupodas.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1625251161.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/21104250149.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/wukewosefom.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/piniwonubulepezuximutem.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e54e66b469---56160388701.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/62001305364.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/17049563084.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/cd01526598c18ab33e066bc165d48ed4/90462627443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mitologia+celta+y+nordica+alessandra+bartolotti+pdfPDF 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_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 16396 bytes
SHA-256: 67d71d9bcb4d806ee1035d084f3dcb5aab00e5fbb19c55ba514d0f9a46114125
font_02_sfnt_off000129f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F2 18868 bytes
SHA-256: c72a08cf92f2789755e7386aecdf20b6b8089ef3d3f6d1d2a754d872eb38d564
font_03_sfnt_off000159d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D0 11040 bytes
SHA-256: 40f5128533f24f5e5d61ebe06affcf0bcb200d9c6eb37bbbc4ec3aec5be6d390