Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba16ae87583fb6d…

MALICIOUS

PDF

77.1 KB Created: 2021-07-22 06:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09d3d1ad24b5cdb909d946128aeecd58 SHA-1: 0906b701169cdf04fa7ef52a037001321280580a SHA-256: 6ba16ae87583fb6d86b3687f4be4d95b4d2b3c423f2ab2c96010739dd643405f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload storage. This suggests an intent to lure users to potentially malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/47298065918.pdf
    • http://yuha.be/_files/file/16594530526.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721bd590622---45446915150.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/69447532927.pdf
    • http://datavincity.com/uploads/ckfinder/files/17923571259.pdf
    • http://hurtglass.pl/upload/file/64631943044.pdf
    • https://accuratesearch.com/userfiles/file/lowugor.pdf
    • http://cuatro-pr.org/sites/default/files/file/begokefozodax.pdf
    • https://tecnibat.net/uploads/archivos/pixuxetesewolusoruraxu.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/eaaaf07911f2991005d4cc06c130f8b5/katelelinakikon.pdf
    • https://directorvincentchow.com/fck_filemanager_upload/file/fifeximizororunawevopamo.pdf
    • https://semut73.com/contents//files/78095319978.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a5987979---vutadaretir.pdf
    • https://motacademy.it/file/12470932525.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/hnf3u0hda396t99q1gt1vot8f5/daseloxuvupapofolapivepep.pdf
    • http://wmhsclassof1977.com/clients/34196/File/bimavenunixakuzode.pdf
    • https://botorka.ro/userfiles/file/82202350850.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/9svma2dmim241bodhvt5c00dgo/natazalefimotunevalafati.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0cadc2acf---6721759026.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/qd1vj5a4op7fu26m763o50i97r/busilato.pdf
    • http://teplorium.su/userfiles/file/zabomufa.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/23afd2cfab7c51d362e21a7f49e2fc0e/45814500963.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5def6f18e---25562517926.pdf
    • https://cyberbirddog.com/userfiles/files/wolulezukulexoganesomul.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8b428395c---19198498726.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=spice+and+sweet
    • 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_off0000c528.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC528 16792 bytes
font_01_sfnt_off0000dd3a.bin
088bff407b3ad78435da2dfe769e62ea2a5f853fe2f72ffcabe634e40c1d6d03
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 17772 bytes
font_02_sfnt_off00010c17.bin
8eeba005f319e4ab38b944426f10211dd8ae1864bc48a9a9a16dd4a0123bbf60
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 10400 bytes