Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1eab08c2b4ec28…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 02:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a244a1e3e2de66213396df0790cfa50c SHA-1: dc1db7c12bc577e71c3a108c3007206660670ae1 SHA-256: fa1eab08c2b4ec2892be47ef29057c9be4c659d64c29df076b7acb61dfee24ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farm indicate an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0be0e09476072a5502ac662df9c86d9d/56734786491.pdf In PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/73035295b00651cdaeb0c758a18ef2aa/xukadugobazune.pdfIn PDF document text
    • http://asustainable.com/global/file/57319937638.pdfIn PDF document text
    • http://hncastlecable.com/d/files/10662009135.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/xidab.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c7fb0dbe479c7a99128e62021399c1e2/tokatobenadegaxojuxikenak.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/87426329609.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/76713788416.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e988be8b54---47023562300.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/f308153529d0e54eacf74690534edc16/xiganabilezisulopezera.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2d160f3d79db0a58377f547fd9d75cb4/95853111828.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/8993647498.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612dee8577a7d---79694157900.pdfIn PDF document text
    • http://contextuae.com/resimler/files/wobubidajagubil.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/ruzuwolamodujafuf.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb398ee1d8---kitasedelarebobewokokap.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/31119540624.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/b4289d04aa3fdb3fb91c337b6481d52f/61729382632.pdfIn PDF document text
    • http://gojjang.com/uploads/files/wudawigiv.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/66055567774.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dd23f0972---2016250933.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/4605226865.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160de33f760cf7---93360233451.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c67dadc5871---gitedepizasagakorezamoxed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=karcher+wd+5+premium+manualPDF 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_off0000d01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 18168 bytes
SHA-256: 877c37f3bbb430a1f75cd9865b22a5393ead4fa61e729b21cdc698ed174301b3
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C7 10704 bytes
SHA-256: 1b908351e6b4e3532536c7ccf545a9c48f1e1852633ab7eeaa5541a375fcb222