Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2962ebddd8e1e8…

MALICIOUS

PDF

75.2 KB Created: 2021-07-07 11:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d98b998cac2e0952eb7ebcecba338587 SHA-1: ae2da9b89cdc23a4160e522d40aa94c2cca40369 SHA-256: aa2962ebddd8e1e8ab8c7e8b203828a67149ce1b9d675f316d76f3a04d816f16
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous compromised WordPress upload directories, which are likely hosting further malicious content or phishing pages. The presence of multiple links to potentially compromised CMS uploads strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • 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 https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/faf25ea49521327b45401536ab502d59/bedofirulofudira.pdf In PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/83045a399460a3f2bcbc477b8ec96145/wuropowuwoberakudunasu.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/04b8b0ca430022cf858d019f415b2243/85559778007.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/mixiv.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/89634486729.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/t3k92er8tdljgs7ut94a2erdj8/10580443444.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/b8169ecf10e32c67b87592471fd2cdd9/78701949907.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a942ff038df---judarosiwikax.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/7d6f3d1fc1d336eefd04318c2f347125/gikagowamokosezug.pdfIn PDF document text
    • http://dytac.hk/userfiles/neledam.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/rifujekorigofu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9417f43954---45209340789.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/budagugiwuwefoxojuwodajud.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/gbgq6mh5j7cau661l96379hcvl/jiratigozepiguja.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160876e1c58938---97504286271.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/tipuxenikukojedobizi.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160885ee3b861a---84145914562.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ab6aa0fa5---84059623873.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783580d9589---parajogadi.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160742d74af689---fedajemunusafepuwo.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p82aje3kaj0mdasjv0c1j3ql70/xupawazimujafakareb.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/vewunamaxadalo.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/lurebosumot.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/70083990071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cry+for+you+tabPDF 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_off0000c279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC279 17728 bytes
SHA-256: 7f587dbdcd32d763028676de52b869b71ad3ac32d6d1ae4cc9e580dbdb529bfe
font_01_sfnt_off0000f0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 10048 bytes
SHA-256: 5085c023ea8a4c43ef69b8774a43ce0633cd43f635a282171502597036d4d264
font_02_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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