Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ee8872e63309cc…

MALICIOUS

PDF

80.3 KB Created: 2021-09-02 05:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 602487d6bde039fa9fd9d6e74a1fab36 SHA-1: 24bad755243b355b254d18632df8d0348c79bdf8 SHA-256: 75ee8872e63309cc74e0a7fa354c1982fea3e0a794e9d0461b7641428ad488f5
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as a lure for phishing or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/372c2878ab1e83ebd7a97c4a95770f45/30654392564.pdf
    • https://securitydm.eu/slicice/file/mipamopabuwawujifirofip.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609855d40c5f5---rilukutowidixajane.pdf
    • https://zivotzaokny.eu/res/file/jisexapukimadide.pdf
    • http://myucmas.com/userfiles/file/61169442741.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/vavofulefomegezus.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad1cad8d1b---49504094404.pdf
    • https://bursakaynak.com/userfiles/file/devituwoge.pdf
    • http://flyingkirin.com/uploadfiles/file/271452434808.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/vc5nmku31ranleg3vgfrbai9g7/vigetoninuraduvotot.pdf
    • https://ibliberia.com/ckfinder/userfiles/files/mejiputi.pdf
    • http://cathugo.de/res/wysiwyg/file/pujuriromadozizevubaloma.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qa8qr185imj8t6ldcolqmh5lu0/47964818642.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/5d61d5836a183e3e66b7f4b6366c044f/27517950208.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01e9fad4e1---24080665172.pdf
    • http://debeleven.net/UserFiles/File/2501466456.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/31814827268.pdf
    • https://freebcard.com/ckfinder/userfiles/files/3718156267.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607545338148c---28264997998.pdf
    • http://lezeckastenakosice.sk/upload/files/pevevikagijuwegejenom.pdf
    • https://samavetpharm.com/userfiles/files/wejalulejijaporadodunika.pdf
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/40450226445.pdf
    • http://gyndoktors.de/ckfinder/userfiles/files/77794071011.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/f4d4fd25b16b31611bec05a410400f63/20723588031.pdf
    • http://kmkonsult.cz/userfiles/file/guwetozixubabevosojil.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=yours+is+the+name+above+all+names+lyrics
    • 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_off0000d575.bin
79b747d9b51cdfa2823e7e70c77f26f57227e0c70ff0ceb20c6d623fcd9c4184
pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 17516 bytes
font_01_sfnt_off00010272.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 16792 bytes
font_02_sfnt_off00011a89.bin
0bba34acd83b3331d5fa1b2a54bd1696ce09d21ad7cb8867106885e615d1b256
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A89 10896 bytes