Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1347cb102b30510…

MALICIOUS

PDF

93.0 KB Created: 2021-06-25 19:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07a964683e445d5d526cf513698dc9ca SHA-1: 9c76c19034e73d3643d83fb5c1326aa702c71f68 SHA-256: d1347cb102b3051081c6dce8c8bb91644e0c7e3fbb4e7619045ba2dbcb947721
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other potentially untrusted hosting. The primary purpose appears to be redirecting users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d283c4ef61---54182620033.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b05996fb5---jakiluvamajiximu.pdf
    • https://guapa2.com/admin/fck/file/9463333690.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160768acd9735c---18674194768.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/47201284330.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084ae1d6c5f0---sitileturusuxotarusi.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/96b7a0a17b173a649f8e1241c882c952/purujewem.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/c68056a9a4c2fa246d4bcf1708d62a36/88323081489.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65d663ea9---78554803528.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f32b294f5---zokefukedewuvuwusogi.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd4b57e63a---korifiwesesikavupanipidig.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792d0a280e9---dukaxatokevuz.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e0988e9db---likejoxepuzoziditetupin.pdf
    • http://chroscina.com/userfiles/file/lugutamepulupana.pdf
    • http://innova-perila.ru/upload/files/zexuzafegitimevamaderas.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6497655cc3---xufuboxokirudotafu.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/h7hugn3f424f9n863f43d6for5/81734811654.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c2148a532---27877213756.pdf
    • http://skrabl.pl/www/rpbd/fck/file/14043253201.pdf
    • http://jkohut.pl/file/25946476314.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/23731218467.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/2260f02dc6e6f0da9184cc5b428fc03a/63197937653.pdf
    • http://nail-free.com/ckfinder/userfiles/files/36911054115.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/t44vj77hrat2f6qso6bsgppuv6/44723018208.pdf
    • https://laser123.com/geektic/files/34937002602.pdf
    • http://reelproductionshd.com/userfiles/file/49307803715.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091300e7455c---pojokagenijudifenu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fluorite+stone+meaning
    • 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_off00010b2a.bin
1028f266687bc576b43de705a97d27b6c09da51e5fcf71d5eaa31c5116feace1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2A 16800 bytes
font_01_sfnt_off000136bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136BF 16792 bytes
font_02_sfnt_off00014ed6.bin
7c870efbe422954905d87a70f0c6f0af52f74b1f1155b147fcd2666bef637a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED6 10528 bytes

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