Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0040956ef8d1b8…

MALICIOUS

PDF

75.8 KB Created: 2021-09-15 13:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5340391851122e6ae50808ad802e496 SHA-1: 11583174d80f8b89c54bfddf3c6e7c8573e6a046 SHA-256: 7c0040956ef8d1b8377d5758d3c588c2b5c85a283408e765fd04fad3b921257c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to various domains, some of which are hosted on compromised CMS upload storage, indicating an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs suggests a broad campaign to redirect users to potentially harmful sites.

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://heldermusic.nl/ckfinder/userfiles/files/gikodekepojivepoju.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/0e6f850be4cb0e281844b6917cd4ee76/gufeke.pdf
    • http://kazuma.ru/ckfinder/userfiles/files/juvafanet.pdf
    • http://xn--9w3b270a7kf.kr/data/editor/file/majapugefipas.pdf
    • https://thuhuonglacquer.com/uploads/news_file/84000921863.pdf
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/vemasa.pdf
    • http://lnyuanzong.com/uploads/files/20210910205054.pdf
    • http://misr-consult.com/userfiles/file/20590662410.pdf
    • https://cfbadalona.net/ckdata/files/sovibigigusotididupoxe.pdf
    • https://branchennachweis.eu/userfiles/file/matopipigiwuwimawefopo.pdf
    • https://ego-sofa.tw/uploads/files/202109100353249976.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/161302ce0cce01---77966421640.pdf
    • http://educaholistica.com/resources/img/imagesck/files/mikupofifegadi.pdf
    • http://www.hangmandigital.com/files/file/87310322545.pdf
    • http://botosani.ro/img/uploads/file/63390978580.pdf
    • http://www.farmaciabergua.com/userfiles/files/falasutapibuj.pdf
    • http://yoshitomo-kokubunji.com/jcfiles/file/narok.pdf
    • http://radis-rrl.ru/userfiles/image/66861506738.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/81ef80b847976e55398cab101e7d7e8e/furazowagebafumunimotuxi.pdf
    • http://allgeology.ru/ckfinder/userfiles/files/nafizaput.pdf
    • http://cnmrobotics.com/files/files/rubejenogeterixotojexufik.pdf
    • http://gustosandvic.com/ckfinder/userfiles/files/kimijurib.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c2a5a3f0---baganazimu.pdf
    • https://mimpiindahsatu.com/contents/files/binivebijewojuremikavibi.pdf
    • http://totoumi.jp/upload/file/moneganerasuwasujubixi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=parasite+2019+torrent
    • 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_off0000c2da.bin
bdb26e53f9ebea599bd75091886fe8e8710c783727239c4c023e844cdb0a2936
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DA 10516 bytes
font_01_sfnt_off0000db07.bin
dcee14944aba954a49ec5b19877e09106bc0a1350a58d6dc3913ed57cb84a6ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 17808 bytes
font_02_sfnt_off00010950.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10950 16792 bytes