Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da2cabcc96d4fc4…

MALICIOUS

PDF

89.1 KB Created: 2021-06-29 19:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bf6f95d400b6afbc0ca78799727cd1f SHA-1: 14703fc098c7dc0c68bd42de525de65c940025f4 SHA-256: 5da2cabcc96d4fc4a8c857e31f20403106583c3af508630e066155be99db8fb0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to direct users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters indicate a strategy to distribute links widely and track their effectiveness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://magyaringatlanadatbazis.hu/dev/_user/file/sofinudibez.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160756b78eddb6---40699331404.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3de7ad052a---xadekenemifozuvofoberego.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b79fab95e01---lidopuzimojodu.pdf
    • http://challendor.com/fckeditor/upload/file/32047836647.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/46f3cb2d15009f9bf3b83976302f1032/74638725390.pdf
    • http://aylincinarli.com/fckfiles/file/jigexewodiviw.pdf
    • http://absigorta.com/E/file/44911301207.pdf
    • https://vegan-eshop.cz/data/file/nawowakajasatibokuzoxo.pdf
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021060420082980554.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f91e5ddfe1---revezujinidusuxozetelof.pdf
    • http://pappteam.hu/userfiles/file/20262493291.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd332006deb---98730876117.pdf
    • https://martensmgt.com/business_school/uploads/file/kifajebekubalapa.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/c44939a42ab7014438b1d7fadbd78c69/nirazeginiwanugevalobe.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/3774055256.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b997accc5d8---33287077645.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/76da23c73f0a67192cb19cd586779148/rosel.pdf
    • http://csc-020.com/userfiles/file/20210629133105_sku6n1.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c94d4187890271d9ed266d37d4ed69cf/99322434021.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077e719a25a2---lavezigatunar.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc679439fd7---nidimazatafikugatewesav.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/35452223c3b4850cc54d1de516f92b66/35384774201.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073929c6b9b4---79213955986.pdf
    • https://ludifrance.fr/userfiles/file/55807173954.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sewer+department+near+me
    • 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_off0000fc50.bin
622ec0decfc709ff2ea03c98ae86c5cdfe3a42abfd76718317591a38af7a5341
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 10288 bytes
font_01_sfnt_off00011383.bin
d13bf4e69959af71ce2e6bf7d58d6df23a625478c369bd67a3b54b9909e3aa2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 16796 bytes
font_02_sfnt_off00013f5c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5C 16792 bytes