Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae2138553dea2d7…

MALICIOUS

PDF

99.6 KB Created: 2021-09-14 05:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ea49ee5a4d32f4430d5d96c0d47c1c9b SHA-1: eba2bda9d357b3de5dd3d92327ad129e7b8768ef SHA-256: fae2138553dea2d770c7c8cace4c9cc24ba2c743bf0efed0dc0c53a97c187e65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised websites or disposable domains, which is a common tactic for phishing or distributing further malware. The presence of external URIs and link farm structures strongly suggests an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://samirkumarpaul.com/ckfinder/userfiles/files/67923969438.pdf In PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1952065ba503523bfcda6f40813bffe/suwedewokegukon.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346f40d072c---jolowoxedajevi.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/1669569598.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/turevebeburetemodapefifa.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/dabopipowafosiviwi.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/37238650505.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/nepixutixidetuwax.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/l7uim5a2thpce46to131df9vl0/88952294938.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210913_908830581B70161B.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/73722922699.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/fobijiwikonepivol.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/putizinofuxarovumul.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/33cf2ece8ea7ca9725cf0a3b9262e008/xifugitikabogawuda.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/13882053062.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/10173775943.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/94100064512.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/wamowowusuzikujim.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/70857801822.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/kiziwojirofin.pdfIn PDF document text
    • http://c-amc.com/upload/files/niwofugukagibewapenib.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/48784662160.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/dagixu.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/jawilaf.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/83214699084.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=and+android+emulatorPDF 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_off0001222a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222A 18044 bytes
SHA-256: 4d26d8106c9138386aae9c45d85d662708c08c37699930f85d0201d09eb6e05a
font_01_sfnt_off00015179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15179 10324 bytes
SHA-256: ee6a815907f9cdb0c4364dffc3eab4321ce5e0b9fdbecec930f8d98b069f1ef8
font_02_sfnt_off000168b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1