Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0e2bb3bcfb36e2…

MALICIOUS

PDF

73.1 KB Created: 2021-09-09 13:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59f7f9e7e31ce4e67604e13785fbbac2 SHA-1: f5ea4dc1548058bb17bb2e38b81e50cbf02f11a4 SHA-256: 1f0e2bb3bcfb36e2a929fab4046ed66cec78c3aac981b48332b53ecacc0b27cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful sites for phishing or malware downloads.

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 https://nomylo.ru/uplcv?utm_term=ps+touch+pro+apk+download
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/xelimofexuveniji.pdf
    • http://kapelski.pl/userfiles/file/mibaturo.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/piromupunadekika.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367c4e7ad3c---jidokak.pdf
    • http://hongdanhaudio.com/luutru/files/waduz.pdf
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/rufubarupak.pdf
    • http://studionegro.net/userfiles/files/nubuxolilupabu.pdf
    • http://022-web.cn/uploadfile/file/20210901085851765.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6a7771d1c55d01d2f08f03e6e85469a2/41059419002.pdf
    • https://wonwon.taipei/photo/file/notoburedetilubisebum.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132fba86943d---nugefonukes.pdf
    • https://durimawar.com/contents/files/sexolilegusabuwunipek.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613625e8c3d9b---48959544781.pdf
    • https://vico-real-estate.com/ckfinder/userfiles/files/vufejilovolevaxibiz.pdf
    • http://coinproject.com/userfiles/image/file/81995026562.pdf
    • http://rideabikenews.com/user_img/files/pilinofosowenupo.pdf
    • http://abyss.sk/userfiles/file/rivenakuwujosidog.pdf
    • http://mintaialuminum.com/d/files/93412034304.pdf
    • http://say-international.eu/userfiles/file/jidodi.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/25ueo114jfmr9dlsj9nn3b4k2n/wutufasamimigajilot.pdf
    • http://elturo.ru/img/upload/files/kigixiwunedovusenato.pdf
    • https://r4binsh4h9-att.com/contents/files/93198077432.pdf
    • http://studiospazioambiente.it/userfiles/files/moxadelolemivef.pdf
    • http://kammed.com/userfiles/file/jejovolomibifepukadeta.pdf
    • http://heaig.org/editor/ckfinder/userfiles/files/wakoxavo.pdf
    • 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_off0000bc30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC30 16792 bytes
font_01_sfnt_off0000d442.bin
34c78cbc5381cce8eba2a9831d99aad6f16abee957f09124d4df7dc04756a112
pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 16088 bytes
font_02_sfnt_off0000fe09.bin
bcbb8ddafd065c2a8f2099c636ada6986c22d1dd6f4b63e5a4ef1289ac8a6d19
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 10664 bytes