Malicious PDF — malware analysis report

Static analysis result for SHA-256 47efb075ba22ce22…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 10:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d2e3dd18b911148654128a69d3b1b436 SHA-1: a704a278caeafb957f1bff1232a6c951caf8f660 SHA-256: 47efb075ba22ce222b8486c8f0076ad0c7c7684d7f1482f5d38ba3cba3a0a6e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=formasi+cpns+2018+kabupaten+bandung+barat+pdf PDF link annotation
    • http://synowka.pl/galeria/file/87917162416.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/21796663526.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/18328086742.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/jimolafuweri.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/timarubazijowaragufari.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/55299600357.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/zivosulujidasa.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/70372882531.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/7304338301.pdfIn PDF document text
    • http://unityproductions.com/upload/files/tebebejakoxune.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0618edc36dcbf237494bb26dddfc94b7/75862408473.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/72323030198.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/niviv.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/bojibuluberumer.pdfIn PDF document text
    • http://pasted-radio.de/web/files/11000076401.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa7646463---gidema.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/49173183161.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/30682307897.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/kuripuvo.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/51005909300.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eff8268c1d---tezufepadagop.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/ab3419c94ee892caea2691ab13a22341/97133282054.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/gesunavuludodapober.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/lunutijinofo.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/towujosofakurajigik.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_off0000d6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 16844 bytes
SHA-256: 476c986a71f033d478ccbecd5cede1fd8849aaec19498a18b87e66f2b5c4a1ea
font_01_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 11728 bytes
SHA-256: 516978781579236b6f597d1d05cfa05b4dff12a8681d5138f04eaaad4de8faf0
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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