Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aba8d22f462c593…

MALICIOUS

PDF

82.9 KB Created: 2021-06-28 03:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 818d51ef0518adc1a7cf7d59599a5f47 SHA-1: 198ada12ffc8ea2bbd3b5ed736d415e39931c128 SHA-256: 2aba8d22f462c593b2f64f19451651f814423e08bd38d0d96a2725d635d41f86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609246df25932---kiwodiwurosasiwovidum.pdf In PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/6624cd1d2172beed2b71a43d47cc85a4/14166404278.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755749a6a68---vafefolubebijobigugerifim.pdfIn PDF document text
    • http://poorclarescork.ie/images/mowaropanojafimavo.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/75071077333.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/85180404062.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/296068f608157fb8f099263328280b3e/kixakugi.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/73032243907.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/44881038086.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/22433507740.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/kunuximarixuguponerifuw.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c7f698c6467f74750e4335fcf92c891b/6912617392.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/76d6da07f8647206fe62828f9fc187a0/figifixuzoregowubojebeza.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/79b9710ba8ea052a7c6681d2b6b3e131/27611437561.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lochda0kdrhptoee360t31fir3/dokarakig.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/48035513798.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c63a4f9c0---85983529653.pdfIn PDF document text
    • https://deepex.hu/hirek/files/vitamotomati.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/uo963pde394ngoisgr4b23k4n4/457784576.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/5a82ea1de3afc60e6e802adf32369477/kulitemoxe.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/sipowixoxesulatiwet.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085de4557e70---tivaxed.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608455d71be60---90828743681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=divisiblity+by+9PDF 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_off0000e15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 17244 bytes
SHA-256: e7579c16e05cc6bc442d820c11fc169cdf86d30383d46d82a2dd1b849c27ff61
font_02_sfnt_off000126f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F5 9972 bytes
SHA-256: a7c1a849872a7e26ee30db687f5ed8305771974fd12dc7058e6828002a541b89

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