Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d342c6f3256a416…

MALICIOUS

PDF

102.2 KB Created: 2021-06-09 00:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1f0df863e2b04b3a9d68b02a1b7a2f4a SHA-1: 824c5c8392156ba7619d4b866d9d153162d8c468 SHA-256: 2d342c6f3256a416eb4b673547ee00b9c7e1818db36f70d77a1e8208550fdc03
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=r+rajkumar+full+movie+hd+480p+free+download+filmywap PDF link annotation
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/9fe5333ccb9b77c048982eb1a42719d0/tifitolibiv.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83e540b8a---2696431419.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e73460d512---64289912041.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b228830ac---tiwoneru.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/tewalufesizisusoroxa.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/zalidejerirufupo.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/pixokal.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9kiu3s58r9ge2fpt277rlplo50/62217137995.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file/%5C/sezugijoxizusilofonosaza.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d04af2a45---17807733191.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tu03dkemgpbs50m4kmm6oh5a70/gojanululazunavozupo.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/17ce10a3a75884f3b73f1986a7cdc3f1/wawig.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098a74d5f3d3---36114166044.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/o8jso6a98h92vclgq0u5f1o5hk/23172553084.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4048bba559---24153941238.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/dutiwuro.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9291aa754---11618980877.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/4e36ebc086de08a6ecc330ecdb3b72f9/76429425801.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016d8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16D8D 18588 bytes
SHA-256: 29234f379e37b5a77b385731f85b5788d0814b491367448672583200114701c3
font_00_sfnt_off000130b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B1 5928 bytes
SHA-256: 7e25ceb96f84771565f4777d81da2937727e575f8a3ec0272ba41eec77675bb5
font_01_sfnt_off000144e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E2 11864 bytes
SHA-256: b187cb3e68c9f7f9b81ac922928711a44c91a7d2f8b946e0c179ba553b339a37