Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc189d12ddaf03e…

MALICIOUS

PDF

72.0 KB Created: 2021-10-01 07:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fcc77eb4d3cf1aff89bc5cb28a4f1cc8 SHA-1: 0c7cca716cdcef4d24e453168ea76e3a19836bbf SHA-256: adc189d12ddaf03e1a2d30f1b3cbf3f53fb12cf308aee0dd7ad01635ee1da21b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised WordPress upload storage and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 https://hfbee.tw/upload/ckfinder_temp/files/20210914105602.pdf In PDF document text
    • http://gerd-pollak.de/userfiles/file/bedufetejobomurixusutut.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/56661401859.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613864e807eda---dukiviseresedijepenak.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/nesowuzikagazejewa.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/83977619831.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/59456423902.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2eb2e8ff7---silavivuxakez.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/5117452332.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/ruvibajitagivedetafag.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/wopusiruzu.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/jafixux.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/sukefiforafujabopux.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/00c884de9d5e2896ee75a20bf3ed8bfe/32268778702.pdfIn PDF document text
    • http://goref.ru/files/file/51134327222.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/71649277877.pdfIn PDF document text
    • http://i-physiology.ru/upload/debusidifesawedifol.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210925112221.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/64834446052.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/27296273205.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/dakepo.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/13987209737.pdfIn PDF document text
    • http://sentidoseg.com/resources/original/file/polepevu.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3ccb5ee52---6958719496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=best+game+booster+appPDF 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_off0000b570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB570 17668 bytes
SHA-256: 1a0d2a230b74f028ff71a32d5d214154bf6cacd577ee42ce55d8a73c75d4765d
font_01_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10544 bytes
SHA-256: 9d90f9f7554b3a25fdf0a2ea723e4fb95ccabcb964418e96d51abeeffd3c0f78
font_02_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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