Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95d919a0a2d73dc…

MALICIOUS

PDF

89.0 KB Created: 2021-09-05 00:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db748d288841fa3fa2a9799d1b7d358e SHA-1: bfbdc13f5b51ec686b0cb71bd8b39f80feed9115 SHA-256: e95d919a0a2d73dc236b13213bb6e730cea29157b68bca7a659eff1222ea0099
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://allytemp.ru/uplcv?utm_term=holman+concise+bible+commentary+pdf PDF link annotation
    • http://dzbnf.com/upload/file///vifolus.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a05e12b2189---43302945552.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/883af63105100d5e90af17acffc092ff/86072029290.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/tuwolobesuz.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/nonikewerematigironuv.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c8c5160d---tifefujijipigumor.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/jagorududakusumukazebo.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/66336791760.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/gegoxenoforekasamevelu.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/dugapimikufededabigaliwiw.pdfIn PDF document text
    • http://artospace.com/pics/file/wologemigajeximifefelixej.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021081305275073499.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1805e38f5---vubomikamoxadaza.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926c8ad29e9---zobunixilisinub.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/78977842388.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8c3b83d6e---91863359132.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/67698020470.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/10eae595710df3c77bce29fba196a2d6/bepuvubefizabapu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5sksit8nq8mbi1h5s24sab54n6/samopiwuwajisuvoporeb.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005a2436ba---bulavitugavawapiguxijuse.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/fofagap.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/dalalanavumamijofalisid.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/16trsrhjq547f7t1fq0beunij4/tupup.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/kozomanejemofudor.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ot8c714bo7vgdo5fs16ptmnumn/21462510955.pdfIn PDF document text
    • https://digireg.se/upload/23864310272.pdfIn PDF document text
    • 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_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 20356 bytes
SHA-256: 221c6bf0b12b7a182371306ec84f4fba24dfc1a7c4e646da427e7df0a7d5275e
font_01_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 11024 bytes
SHA-256: f8afdd70d872c7939f5ffe120caf065f3c279c7f5bbc4d10b755341f8e597743
font_02_sfnt_off00013e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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