Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae9181b648986c8…

MALICIOUS

PDF

82.9 KB Created: 2021-09-06 10:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5428c51c2620fd36bf9d282dc82da436 SHA-1: 2df6b4c2cc663fa15a06b7396d4c8c775d3cf11b SHA-256: 0ae9181b648986c8b130be38d0f2be246776d29f90bfbf2a1473f71b61f9fcd6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/58187796399.pdf In PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/89317057123.pdfIn PDF document text
    • https://daismene.it/file/vawisu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090160383398---76054771068.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/935898871.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ded60b48b96---36886133182.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce14878ad1a---91484405075.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/21956835026.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e13bf10c5---mevudarel.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ee85d3de714---meroleduxodejozuripekom.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce9de9346---12418046893.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbd8c1a8f5---87400590933.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16114a96dba610---tujuvixop.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/43737899908.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/f78108bb5118e593a057e860e690c1c8/vefij.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a11d520b973---suvukizojebofijemidade.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/favokirisapovarumekegi.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/14489875243.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/lurasusorisataduzovo.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/55026401614.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/ligamadufili.pdfIn PDF document text
    • https://guijek.com/userfiles/file/2555745085.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/4k72ed7piqmlma8t8icl7sm1n9/28106686922.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/54824301746.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bffab29d7---68746427312.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b97462425c2---geluparote.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/pogonodebipipepetos.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd680d650---29124294970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=daniel+ofman+core+qualities+pdfPDF 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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 11028 bytes
SHA-256: ad71c352e617d78f02ee6a9e41c7b8eb9e1ba3df845f210b67501bcdd6ba8259
font_01_sfnt_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 18252 bytes
SHA-256: 8b457f17fd417a0ff2dfef67b7cbdcccd1f9533941e9244305e836c211a71ffc
font_02_sfnt_off00012570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1