Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dcfbf7ce06baea…

MALICIOUS

PDF

83.0 KB Created: 2021-09-12 01:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c8f6b10cd293e6b9dfff4b60292eea57 SHA-1: 14bcc907e2e760501bac0b814699f99e1575bcb0 SHA-256: 40dcfbf7ce06baead7f41d37055c1d9646edce77c27d011fa03ca5b19b1adbdf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are designed as link farms pointing to disposable hosting or compromised WordPress sites. One URL, in particular, uses a 'watch movie' lure, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://inwebjor.ru/uplcv?utm_term=watch+john+wick+chapter+3+online PDF link annotation
    • http://gsxr.hu/userfiles/file/pobof.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109050643214357.pdfIn PDF document text
    • https://amgaa.org/temp/files/bifojuwigixivuruzuduw.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/25878402697.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1e87e41c7---tonugowefati.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/41399306952.pdfIn PDF document text
    • https://ever-progress.com/upload/files/gaxorad.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/51232389592.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/33157326492.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ba2345fe0---nilul.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/33672199445.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/92887084734.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/mupetonadelixaxa.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/72502051793.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/nunasagotinimoxodivomur.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/samosisokakozev.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/newimame.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hlpfshg5lvkt9nfnak4pumktln/8962208585.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021912_6441_968.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/vonigo.pdfPDF link annotation
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b5b5785b---vebanapijavonuxufumo.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/mirowelifi.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/jedosugidaji.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/menafimibufabamamanuwezel.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/petajagumufegoridujalizis.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_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 18096 bytes
SHA-256: 6bf7fe73cb7ccd0cc43b2dfdbe28699a5fb7e9c1dc6c1e92574619bbe1afaf59
font_02_sfnt_off000124d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D5 10776 bytes
SHA-256: 454988aaf5a966d2e53648f9d657e5b4823e54402fbf8218e1ea21c275c10837

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