Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fc167f4ac5d6ef…

MALICIOUS

PDF

555.6 KB Created: 2021-07-01 20:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e5a6c3e97b7b5ef9f9bb6fd19f07da90 SHA-1: 57399d67da9476642942186d446d6f97b4d85270 SHA-256: 93fc167f4ac5d6ef76cc3d302eec8556f172b8d8e6dc6a4488151936cad052b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external resources, some of which are hosted on compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The 'Clipboard command execution lure' heuristic indicates the document instructs the user to copy and paste content into a shell, a common technique for executing downloaded payloads. The presence of urgency language further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6591

Heuristics 7

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://megat.pl/uploaded/fck_files/file/futubaxapoxizinexuniwi.pdf In PDF document text
    • http://blesk-stroy.ru/userfiles/files/risaxuledadewex.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097a8b09a0da---21115705328.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/dinikapadixisozudurudo.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/fmfg4u6qbsubcgtct1p9h5up1v/tetefepegofozo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc080dcc8f4---83070432026.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/kizijoxon.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/68862956102.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/88c68a6a2a8eaef236141d258fd75c60/3637761739.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be689dc3d9a---53425433746.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/28893729011.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/32c43d419b86bc1e3396473e2661aa5b/wojubotaf.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/jepebudagolezawuwimepa.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608096e49618b---xujofuw.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/86a1e896e7f6b5a9dbe6901cd81c50c1/23507888779.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/guxoludawabuzejijowitelot.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/mijavere.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/gamor.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/tukanurogiwaxirasadi.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2f1d9937e---posawitiwegizusafoniw.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/54a574cdafc619234825d2759cf36c37/57039633251.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/gumenemirugewurebamopur.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/kagozuxikupusekurawob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gold+experience+b2%2B+answers+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_off00082348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82348 19596 bytes
SHA-256: 78af74cd041eca20151ca76fb93629dd32b231de43c4c8b73f3789a79a72d160
font_01_sfnt_off00085530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85530 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_02_sfnt_off00086a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A51 11000 bytes
SHA-256: 9fad1397f130b755dee9589c38c58c1031ecd394f327cf9e3872071e70e2541f
font_03_sfnt_off000883e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1