Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e57e92b36c4d53f…

MALICIOUS

PDF

70.9 KB Created: 2021-10-04 14:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3bda362d8407eab9c83940de77decb44 SHA-1: f7e2d647467500950d8a000247381ada5cb2e27f SHA-256: 1e57e92b36c4d53faa91d4bc873cd1c1b11d5d175a44072703cda6c543081e0d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics show embedded JavaScript actions and a link farm pointing to compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The presence of JavaScript indicates an intent to execute code, likely to download and execute a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7b35bff1b---27129050535.pdf In PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/jirimonoso.pdfIn PDF document text
    • http://djpress.pl/Image/files/14137941094.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/susoxewewogulejizuzi.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/nqqdr0j3e5v8dq3tbml9k9q2g1/netibapuxumuladalejasufa.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210909_A5B7FA6A7EAF07FC.pdfIn PDF document text
    • http://emannsltd.com/userfiles/29245450737.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/majimuz.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/acea115763c17d16cd90650bcf362514/gunafawelavupamuj.pdfIn PDF document text
    • https://computerzone.pk/file/newutigalo.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/33854261963.pdfIn PDF document text
    • https://gdaniec.com/upload/files/fezikelekanuferemoxiz.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/926141f3ff4ccb4ce624cd6bda5c7ebb/firawuw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ce697cffb---58424815080.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/mutipiroluga.pdfIn PDF document text
    • https://davaocarrental.com/images/file/31782537209.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/xosowenisobum.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/boxojopojeg.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/89795987596.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/wowinojijalinokowileg.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/22013962208.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/83459072597.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149d5f977e48---54861559097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=twisting+dumbbell+curlPDF 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_off0000b6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A5 15660 bytes
SHA-256: ea9f070111e1ddb17dd2fdbed078e38419116afe5479d3e1cc030dba5f52ce0e
font_01_sfnt_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 10720 bytes
SHA-256: 6422ed94ca80df02de4b6f094b72f1f6ad3d1f16eec6da546d9d9e03b8d63e9c
font_02_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.