Malicious PDF — malware analysis report

Static analysis result for SHA-256 2708cf4a7d438f47…

MALICIOUS

PDF

103.6 KB Created: 2021-07-18 18:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b5bb2581b73c9728fbdfe17513ec1e80 SHA-1: e115335502cd1a4ea93c871e659b4cefb6f3703c SHA-256: 2708cf4a7d438f4700a9e12fe5aebb2620a2b769862ee4e38db26d1f291c436a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload storage, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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://rajaunited.com/contents//files/visisobavin.pdf In PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/55e4c35ffbdf05e406f2e2b64c13452e/nagubufebomoko.pdfIn PDF document text
    • http://lactopad.com/uploads/files/70962295381.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/i90j32h4c4cttm42c1nko3j9k5/ximoz.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/tg5jf4h5agnjjgh5ph3nherss7/giniketufulu.pdfIn PDF document text
    • http://lossfundraisingevent.com/clients/f/f5/f5ed5e364f2f51aa46a4c5982fab9a07/File/14611879120.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0e64ea8b3---morofixenusopobezolabi.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aae6303ace---zaretezajaru.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cf955b8b5---pomiti.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/18f8371f37c7593b7b3162035ea87c26/15975827088.pdfIn PDF document text
    • http://dges.in/userfiles/file/55148492615.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//3279289064.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/92b0e99f511511b62f87d36f2815baf6/muwenivixa.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076381898662---nofizowosemizumita.pdfIn PDF document text
    • https://proia.bg/userfiles/file/1086580337.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160992224706fb---begokebumobapameru.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/40735115976.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072024b15156---xipemoguvopisorumope.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/72c60fe2b965831c393fb9e5c7052a88/daxavomoti.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/42650145072.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/gumato.pdfIn PDF document text
    • http://amandamaitland.com/images/file/92282348553.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/66571335411.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/zepetiwegujisos.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/f2dcd4tf6q1qar93ibp4fj2m95/dozunafeburomibukoxowif.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/10851186567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=miss+asia+2019PDF 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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 16600 bytes
SHA-256: 0ae02f45f8b985933db4cc2b475899ee6b8947cce7205c713fcceb364d83120c
font_01_sfnt_off00010605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10605 9268 bytes
SHA-256: 5577618a877ce926f5dc8fe62760e2bcbeb54be84f6fa83af08ff42ba5073184
font_02_sfnt_off000123ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BA 9956 bytes
SHA-256: 5f1a5bb59731b7e904fbf78d9ff8c3d68bd557889687ba980f5bb42bd6f899a8
font_03_sfnt_off000139ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EC 26884 bytes
SHA-256: 2099456300521b79657648df6c6547baaf9cc744e7ec776139030c4d8d64e329
font_04_sfnt_off0001781a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1781A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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