Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ba127674948f90…

MALICIOUS

PDF

85.1 KB Created: 2021-08-10 14:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c35be2c121e86755eb268ac3b72a3a40 SHA-1: 75b6d545ad857b5f908ce400973d7283f8f9ae38 SHA-256: 67ba127674948f90fbc88c4500259e0d9eae4c7f772723dbdba182d8e9a63b5a
212 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic firings indicate the presence of JavaScript, a link farm, and a direct instruction to disable security software, which is highly suspicious. ClamAV also detected this file as a Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=mortal+kombat+9+download+apk
    • https://snqrsl.quebec/upload/editor/file/68212048270.pdf
    • https://oilbasaro.com/web/images/ckfinder/files/20210717174237.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3baf5c4741359505fe93c815f4935b33/dosumakekenepaxesojak.pdf
    • https://aartipalette.com/userfiles/file/69259553714.pdf
    • https://securitydm.eu/slicice/file/setubokiwige.pdf
    • http://fujavietnam.com/images/Download/36668218182.pdf
    • http://www.tobywells.org/media/fckdir/file/papaze.pdf
    • http://vanxuantravel.com/upload/files/xetiwizufosigolomejomuxim.pdf
    • http://classtool.info/upload/files/77302126027.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6889d13e59d998577d034e592e47c225/nijerul.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ltjmb6ls323pvmdp1rgerli2m8/zawibasiverisekepav.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f944231c4af---ziwarixalivaz.pdf
    • https://fidelishospice.com/ckfinder/userfiles/files/wolajinibiduwebil.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/481cb6102b929aa22703fc8a3ecc2ede/87870602213.pdf
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/81829663738.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5aa970fe01---17059558893.pdf
    • http://architettosbaffo.com/userfiles/files/titejunupijagirugumalevo.pdf
    • http://dentherapia.hu/files/file/gibilijaroguv.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8356e812b302368cf76c673344853791/17007715572.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/257e7e245f3c1544e272db73fb6304ad/34275534817.pdf
    • http://blow-w124.com/js/upload/files/peruzaxemonimotigefu.pdf
    • https://sardavetri.it/userfiles/file/balik.pdf
    • http://szentimresiklos.hu/upload/file/15088489445.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e821.bin
984eee5b5f0e15e6080869321daa5859994b56b8fba383984fa526b4a9a3ffd7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 10640 bytes
font_01_sfnt_off00010059.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 16792 bytes
font_02_sfnt_off0001186b.bin
4126fb5a6bbe83aba44b51b963f9ca1fda4c9e084e8d251b4b6c5afdf367bb7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 17720 bytes