Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a14a30aa961b01a…

MALICIOUS

PDF

86.9 KB Created: 2021-06-28 02:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 905a173a98b9562c419bb9ee9785f1ce SHA-1: 8e64b6379c051b02d1831f455edfbfa9049484e1 SHA-256: 2a14a30aa961b01af80f84eb7126b01eb6a96364774ed0e7202cde9042693eee
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://greenbrier101.com/userimages/tejaxawiveluxisex.pdf In PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16084a35147515---winojexekurasepowezo.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a269bef20f5---83009493682.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/9d42a30f2ff2816420bc9b9d4b596a5a/gepugaxulezujurafoba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c46050f68---33036774623.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160af46feed39e---detotudurasafutimi.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3b00ca60---70393774972.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa745589a---juruvulirenukeru.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/3305719440.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b06730a3d52---6273360222.pdfIn PDF document text
    • https://capecoralliving.com/media/file/42917369563.pdfIn PDF document text
    • http://aurora-c.jp/files/files/1826963046.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/9648c664f38e34486c938dfe159ef0a1/30090313890.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b7f5c563---88381595911.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/82256313420.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/c9bea695dc2751b7102e79cc71d18010/mixemuvuv.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29be0909c---21438114028.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/44147364728.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e34c8ebc---nezilafuz.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/8gclrqq3f3susbsv4i4k8qhe1f/zuveti.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/3qdomahet9u7l4kci10t1l2936/fozorevokubebakoxulufe.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/86861989133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=geographic+tongue+treatment+in+ayurvedaPDF 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_off0000f07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 17212 bytes
SHA-256: c54b3c5cd8bfb15216acff7df32a3f79067b4f560e2c35abf94d4b2a53e01825
font_01_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 11064 bytes
SHA-256: 8b3cd9d5c9f862bb282dc8f0d5bbe084f342e911bde129a55bb9456982d29c62
font_02_sfnt_off0001367a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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