Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a463ca17b9cec4…

MALICIOUS

PDF

93.8 KB Created: 2021-07-21 15:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d3392426b7771b9ce4391224715a0fa SHA-1: fd01cf9bba5071c65c47363370fe60163369080b SHA-256: 68a463ca17b9cec4a66917f6c588210d0bb62eb50a38e662589b56201f3f1813
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and compromised upload links points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f6c2582a---59964883837.pdf In PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/65867604048.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e5eb2f10267---73835260775.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/ruxujigamozavunega.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/a3326c2092dosroa5bkuim8fku/56248660935.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/77125299909.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/48668343410.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4991953cf8d9602ae467a04e8b3701ce/zufadetotodixepakefibo.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bc4bd8edd---66591284456.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/digemerikuti.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210622142603936201lfvozp63i1jb.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/69272810779.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/7307979ef0d02fa4dce1ee7d4815b6d1/gasevunejakizamesum.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/51544307097.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/30244535457.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a67086cf44216cd07c38bface21a5e74/xoxupusetatesonobu.pdfIn PDF document text
    • https://codecs.ro/images/file/funiwoxafab.pdfIn PDF document text
    • https://banghenails.com/upload/file/30675811683.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/50293568291.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c432d6f6f---62580959730.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d69e00e010---pexusevepunulalunotot.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608af10736bd1---24550451201.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075023f2bc2d---17950681827.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/futekepofagevorazuzexef.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/67783986098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=lhatese+puppies+for+salePDF 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_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 17436 bytes
SHA-256: 29ebd4f5de3ed7a0aa9c1107fbdcdda70ce008ffb12a2f6ee9255a25b52fe2bc
font_01_sfnt_off0001386f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15086 10408 bytes
SHA-256: ddce9b1acbc4eedc376bf129cf8ca52f1c2941ff96c7744574d9a6eea6f1ee21