Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d82fca7f2dfa641…

MALICIOUS

PDF

86.6 KB Created: 2021-09-17 10:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 64f478c63a41bb92ad5cbbbe0b3d17d4 SHA-1: e9391979af5769b0b1a65fb0e26cabec1e61d356 SHA-256: 6d82fca7f2dfa641ec8377fec316c82dcf15773c0050412d691befb75ba66a1f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable domains. These links appear to be designed to lure users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b5e53cd0b---70744994447.pdf In PDF document text
    • http://novena99.com/uploads/files/202109150827207489.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/fegixanikof.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/lujot.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109021316454776.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/lumaxagoreri.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/juxazorebutuzexapedodafin.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/64288410990.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c65ed3b69e8f7dd1d868b9ad30e802c8/ravifonu.pdfIn PDF document text
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/guwewiromebewijefavade.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/rebokilepimakuv.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/94381159879.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e92cd7706f1242c2aa48cea6f1f1ff9b/62701343409.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/votuvuvowazugekolanoluve.pdfIn PDF document text
    • http://eva.am/files/95b137a87c1c656c.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/90195284985.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/41308283940.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/208ec96827d45db0f496284e2037bf87/33969434176.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/13703801739.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/59515976217.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/55950000553.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210902_180527.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/98185161774.pdfIn PDF document text
    • http://budropol.de/Upload/file/deraf.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/24560586902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=zack+snyder%27s+justice+league+2021+full+movie+online+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 17816 bytes
SHA-256: caa34d7aa836e542ba34a8357a4f061128fc0962ebc62c68193ee8310fc20895
font_01_sfnt_off000118d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D4 11612 bytes
SHA-256: 3d47517b38f41801caa628aa7ea1cb4964e84cad032405a17ff1a7c3d1d8d7f1
font_02_sfnt_off00013471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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