Malicious PDF — malware analysis report

Static analysis result for SHA-256 093dc8dd6f38c678…

MALICIOUS

PDF

79.9 KB Created: 2021-09-05 01:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6ac56c402b2633c2dd8195612881713e SHA-1: 04625497f3e10007185e8b9af02a56fb5ed227e3 SHA-256: 093dc8dd6f38c6787f4aa8ba9595d4a166cd410c3a5207098d5d328d96064809
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lead the user to a phishing site or a download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a80fd776a7c4b8bcc3a0093338831f86/rujefozuwi.pdf In PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021063014313673499.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/19495726396.pdfIn PDF document text
    • http://charivne.info/images/file/3776004993.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8037ec49b30c45016a2f177030ba5e55/24533894739.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/7gs6u5csidr7nkrbfdb28eg440/tevexolatavenovem.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/eeaba4525bdbf1c0ac2c86b38433ae19/48124389989.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/d8f02e7757f882af6531d99d221952c3/23090024487.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/45341120745.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a454b6c306c---pudapewonawurejezovum.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/zupotigodexutejimewuba.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/96301114196.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160886bdd39ea8---simebunirakowugufu.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/volitufezunelato.pdfIn PDF document text
    • http://fotossc.pl/_files/file/bexunakabedomaxoxubupax.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/1q961cu1chkeg8lf1mkvfbipqu/fosegakogupobizi.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/kosarininipikevobikigunij.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/40372823457.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/671fb4e7f1b0a2ec55372e32bff7bb2f/37808608396.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb47fbdc901---jovogukisuzozexuvexu.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/6f0f77492e25491136d3c2b02f3765cf/29797662870.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/fanisazikisebaroxafugem.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/rofakofadodur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=paracetamol+overdose+management+pdfPDF 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_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 16928 bytes
SHA-256: a73933e4f3d865966c869778a55e576bb421d8c04db4f1e1ea3fdd90bff865b0
font_02_sfnt_off00011885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11885 10940 bytes
SHA-256: 5707f34701e650606f12ffb129cb1cf9df7beed0bc7afc9c9c4e27039c855025

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