Malicious PDF — malware analysis report

Static analysis result for SHA-256 69466fb073ded31a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 08:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 95fa6cd8592abf3dff9d428aed4993c2 SHA-1: 1e043e81f911d07f39b8af6e43c0627108e43a95 SHA-256: 69466fb073ded31a5a9392dc479eb9504319f231217b81d7476890a74ee13f53
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No document body text was extracted, but the heuristics and URLs are sufficient to infer the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://agapetown.net/ckfinder/userfiles/files/rovilaliso.pdf In PDF document text
    • http://santabruna.cl/upload/file/8058296436.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/74816904041.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/93890055211.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16140588a9ac4d---vopolekixa.pdfIn PDF document text
    • http://ave-france.com/pics/files/fasododu.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/ririmejidoxovujogeroba.pdfIn PDF document text
    • http://clingac.com/d/files/tapadanekupivibaro.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/lotulazoke.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/90257570948.pdfIn PDF document text
    • http://mauthietkedep.info/upload/files/87673562543.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/bupenemajuxopeborudu.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109190558123835.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/timetulisu.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/ramejulozo.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/76349772550.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400d7d5e7f2---76415455965.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138085a7f6da---13711538723.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/novawoxigogusagejabepokiv.pdfIn PDF document text
    • https://securitydm.net/slicice/file/83617795076.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/58c465b76e5fe2b4c9b9580a84f1cab5/16954573501.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/18837308600.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/rizoseles.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/44809450912.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/lazororutaraxamejot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=duck+life+1+unblockedPDF 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_off0000dc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 10324 bytes
SHA-256: 1918255529bab055e96d5c4ae05900055b0a94e630f77480c96781a06fec8fd5
font_01_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 18272 bytes
SHA-256: 1ae1b6090e060b35c430862e08b2af421302cd74dd2a0e85625175b089de4d4a
font_02_sfnt_off00012376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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