Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a146faebbee168…

MALICIOUS

PDF

87.0 KB Created: 2021-07-13 18:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0267ad8fdde71bbe0e8d9d696f84a9eb SHA-1: 7f5060dede6e75b9d52e186ed0f3f17bca9209da SHA-256: 29a146faebbee1685eeea4877dc1310df706de3dd29c7f48598f242eec8520a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://waypl.pl/upload/File/71980508412.pdf In PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/70024653610.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607037c119d9a---54583072559.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/karagel.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/d8d0615f589958c4d9ce2d17536ff845/27193046054.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16075099e807ac---wamozupu.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/77255435890.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ada392df9---vivupudezuvofimi.pdfIn PDF document text
    • https://aashianarealty.com/file/wugenokobujidiwajulexar.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad800493c89---1522336681.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/jefutarov.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/f66bfe2255cfca6b9da000cdd89f7179/kigimunasisigowobafir.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/mcvimmhlpfe9isopghpl0n1p3c/ludovujosesiwogade.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-17/20210617172940914486.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/50915423457.pdfIn PDF document text
    • http://ddmlife.com/ckupload/files/37982562949.pdfIn PDF document text
    • http://huiking.cn/uploads/file/192034056359.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160712b510028f---97234529159.pdfIn PDF document text
    • http://teraval.cz/res/file/81438859851.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/2g1bu27bgktvc9rc7204d0uc2o/16341727583.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/69643050457.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9707c1a67---42713528318.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f136436e0caa7a4458d68b939326892c/51532179604.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d099fd4400bee8ac821b5b45dc984c7c/fosiguvowepemifejefiwubuz.pdfIn PDF document text
    • https://invest.pl/userfiles/file/58543359928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+remove+private+browser+on+iphonePDF 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_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 17184 bytes
SHA-256: be368c8f0f225f6e0dff95ea1e5f8af443760d25389b4d3e4406d8a72cb09236
font_01_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 10752 bytes
SHA-256: 06133d06314511a382dc98a0214e72d9e3b9f4aaf1041b7aa9e803982c9a73cb
font_02_sfnt_off00013674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1