Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc14ba29fa9267b…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 00:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4fd2c6da5d07888648d3ee9201d51a0 SHA-1: 0073c9f16816a7416ccb7c1ccc3434bb10c0625e SHA-256: 0dc14ba29fa9267b2c93bb3628117cfa2b7fd324cad0fdcaabc2ea32bbc72825
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files or redirect users to phishing sites. The presence of embedded URLs and the nature of the link farm indicate a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ff21050ad---2109243095.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d207f342e5---36111951244.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/fiponoxorefulixudujenukak.pdf
    • http://arkystudio.eu/userfiles/files/65094404895.pdf
    • https://theatresaucinema.fr/uploads/file/71677153183.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e46c771bd---22902447302.pdf
    • http://forter.vn/hinhanh/file/nojexetazawebevuzuni.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/95a06f55ab3b27074becd3c099ca63b3/fedabakofebodanopema.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba46c5b34bf---pajuvaberokojejanan.pdf
    • https://ludifrance.fr/userfiles/file/11672738629.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c2315952437---kunomopinepegijemabol.pdf
    • http://macabrey-luthier.fr/data/Files/bitebedavegado.pdf
    • http://kcobafl.org/ckfinder/userfiles/files/71625825614.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be1b7c6e62---3921016099.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b625b2a3a5b---82740584683.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8062468adb---wufogefunesesob.pdf
    • http://zonweringbelgie.be/ckfinder/userfiles/files/70029610372.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a62ff4f3e1dd2a35af1bcb76b6edbb95/44848004722.pdf
    • http://sns-russia.ru/userfiles/file/sikilewisufufotag.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e396507f8f---tabujotapogol.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/448bcedf32ee4225889a3b16ce1aa89f/pavudezoxefogujabizuka.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f3aa6f9031cf36a2bfcd6eeb21bc7732/65539289299.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-12/20210512110739344619.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/5e9833e9e5ea594ea88689fadfb52f63/xemunekipowe.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/396e383db5bce56b2cc361964f3a7689/94476261116.pdf
    • https://ferado.vn/userfiles/file/dezegi.pdf
    • https://nadinerogger.ch/userfiles/files/kebuliretaruzola.pdf
    • https://arvikabc.com/images/uploadedimages/file/22155570649.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=new+country+line+dance+songs+2019
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec36.bin
55d0192529a6ed5262e9c02c694e5c71ab35f8b6acbf3b2b7222a39262e30008		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 16876 bytes
font_01_sfnt_off000117b8.bin
a7fce00f2a056d2587cc6e1b9e6fda3276b1eba95a46b7773ef37584df052586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117B8 11284 bytes
font_02_sfnt_off00013255.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13255 16792 bytes

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