Malicious PDF — malware analysis report

Static analysis result for SHA-256 faefa2a7adc4c83c…

MALICIOUS

PDF

136.6 KB Created: 2021-06-26 07:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 56918bbd75915b4cd78601455965199e SHA-1: c5313c57119187222c7afb370109dc4d60806f2f SHA-256: faefa2a7adc4c83c1ca97f43e64d1e9641365029c4bcf773c1a6dc4591af4bd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. These links likely lead to phishing pages or further malware downloads. The ML classifier and ClamAV detection strongly suggest malicious intent, with the PDF being identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609619cd13b66---petavenopezo.pdf In PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/3dtap5cutu6v8rkaglcsm7bmc7/61362349694.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/zevizupebapi.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be9226d590---saremiratijuriwitabowo.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a09b3c135e6---wofela.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0440ddb2---bodatixebiwunofabara.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/80927906994.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160be17d46e58b---gareloziruvira.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/mogosex.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2baedec7bc---manojetovubovagojurelaror.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ksc105ncbmdlr960dm096g6ob4/7417323153.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1df3767cf---96188602988.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/kob6d7225ut3ddokpfngihjd4t/kavoxamigogudoxuputepanid.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5725079e77ef90960f378d4d13cc7577/jatibujufuv.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/2tv28emuf9qreib3dv7vpv2471/turuteluwuril.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/gedakotenopowegunoti.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75f2a6a4e7---vigufalu.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/sesozisisurujiru.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/89248477486.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ad2f2083d---98968347622.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/sunirevimimaluvedadot.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/93576567610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=texting+while+driving+a+motor+vehicle+isPDF 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_off0001b24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B24B 11036 bytes
SHA-256: 1e09bc4cc5e98c13f69856255f713336be1d4a31b4100b78f7a752adbea8a589
font_01_sfnt_off0001cba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBA7 18752 bytes
SHA-256: ef866aa61b5fd5e01d3b57df72286ed7a6358575c37ab12ea4a56bd8022d70dc
font_02_sfnt_off0001fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1