Malicious PDF — malware analysis report

Static analysis result for SHA-256 9903613194d04f67…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 05:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 66873df8fd59bc75ee53bdfef036da0f SHA-1: d9eb4e26c057fcb13d9daa07caf2fea28a81be0c SHA-256: 9903613194d04f67f0cec7c4609e19b5e690b099413a3aeda9d9f7662f14bb26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://smidgel.ru/uplcv?utm_term=tom+bancroft+creating+characters+with+personality PDF link annotation
    • http://namngonviet.vn/user-/files/60908480972.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9dfd9bd4e---16491724586.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/sadevoze.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/bonuzop.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/wupobikezolilodefa.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/aba8e86ee2d127874b0bddfb86891b72/82878286605.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/fijiwofovetu.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/36874703851.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1aceed0ed---86920081034.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/vajujivokivofesigajus.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/019tntt49u5fdu17ros3uaip2i/99096439687.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/13879419298.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/37885578579.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398589b5fcc---90836409498.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/xegufukolusojimaxozofil.pdfIn PDF document text
    • http://snft.ro/media/file/gozokomibomiripof.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134803c0fbbb---70382149206.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/66813974079.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/tupebogebir.pdfIn PDF document text
    • http://chemicalengineers.ie/images/35825747431.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/48195706151.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/joxumebezisomajanafevare.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 11228 bytes
SHA-256: ae648cb30f07796c437347c362bbdba6194beb0ec29713121a5bfbd2804fea95
font_01_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 19200 bytes
SHA-256: a85944798dc18799225770053fbdc32a30393c836be81963e58f7500645b1165
font_02_sfnt_off00011e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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