Malicious PDF — malware analysis report

Static analysis result for SHA-256 3438302f4d5e0620…

MALICIOUS

PDF

81.8 KB Created: 2021-09-16 04:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9edadcc7e61c3145026675fd5401ce7 SHA-1: 03c9179a8f62393dd84bc607e6ad61e501b42471 SHA-256: 3438302f4d5e0620481bad0aea76d784dc9733ea4df47eac717e6acbec66780c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits high-risk heuristics related to random and compromised URL links. The file contains numerous links pointing to potentially malicious content hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect the user to download further malicious payloads. No scripts were extracted, but the presence of multiple external links indicates a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://piscesappliances.com/userfiles/file/punuxusonugugan.pdf In PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe8ac64c6---sonumigopodas.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/99364049132.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300935032c4---gepidipesenuwukunuteseja.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/86072788603.pdfIn PDF document text
    • http://gibisch.org/files/files/bufadixiwajaxop.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/5810280067.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/19781848068.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/34283877371.pdfIn PDF document text
    • https://kettosallampolgarsag.net/imagini_ws/9617114565.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b71eeb854---wogivukemuxijel.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/26623054900.pdfIn PDF document text
    • https://estoniapools.com/contents/files/54810992441.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/sumivogupuwikuzowem.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/vuvumefediseruw.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/smoddeuqcl07ep1rm5ul3rf861/riveselexofiliduxe.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/77097242099.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/bumorubetezexo.pdfIn PDF document text
    • https://breedlife.com/upload/files/80058822831.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/vugogeromokalazovan.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/47880730837.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a922f41788---pipunutofanixil.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/65170588375.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c50c2cf9d---24175218942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pet+listening+pdf+with+audioPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 10864 bytes
SHA-256: e8b7dd31fcc206dcd2a66146867ad09bac1347c650299c281ea954fe8ffaf0cc
font_02_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 18188 bytes
SHA-256: 907820cb77a1ae3a74b059e64e58c2105aa401dcff9a56d338823a6e55640e98

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