Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fc817e84223b14…

MALICIOUS

PDF

104.6 KB Created: 2021-09-03 01:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4ed171d56d2b094684138390f15c7b37 SHA-1: a929d80c9419747907b07430c0cf6073c72a96ad SHA-256: 75fc817e84223b14554a011e6b0c02a2b09227a7512bd9a8be80ac9743b7a208
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and embedded URLs indicate it's likely part of a phishing campaign or serves as a dropper for further malicious activity.

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://medvor.ru/uplcv?utm_term=commelina+communis+pdf PDF link annotation
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/tupubigaf.pdfIn PDF document text
    • http://ashioke.com/images/library/File/61305833105.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160792a082e2b4---2478697331.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbf3612631---zekitugazu.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/kelusukatubugaja.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/jipogevikukolabonejep.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/07/02/79951388762.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/vudidagedemejad.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/m17n5ntflebmggif6agovhj4k5/nenotilefogoredu.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/29350414901.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210730_203630.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c6f596d72---xofusefopevu.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/90796030971.pdfIn PDF document text
    • http://cosyromania.com/media/file/64415973006.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/15642876327.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982b6be8426---kogebokofojexopofugo.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/39884845327.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d78ae7c2f6f---wiwimejabexovoximal.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/wizakosavividetedi.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/62256175786df2fe7e7a168590b9eadb/17201401379.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/89860949383.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/97159407221.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160970c2a16b73---54261302515.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/jokaxewapegezama.pdfIn PDF document text
    • 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_off00012d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14558 10716 bytes
SHA-256: fcb82a8a69542ae03223785780b4ffd5f27999931d29c547a2b74e26d2258a94
font_02_sfnt_off00015de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE8 20764 bytes
SHA-256: 7f76a13c621b9450f4db5c041be36a47992d0950e065dbf4e4929e2e01e396ca

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