Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a7bbab49b609d3…

MALICIOUS

PDF

88.6 KB Created: 2021-09-13 20:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f14bab0366bdde9e4fe1e1b4ea3be626 SHA-1: b9ddab0ac25ba3feb87dc415114393b763453231 SHA-256: f6a7bbab49b609d386c970bee43bb95ed4e34547a1941c3ea84399156c0e3cab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript and numerous external URIs, including links to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The primary purpose appears to be directing users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chcial.ru/uplcv?utm_term=realistic+offline+games+for+android PDF link annotation
    • http://moretonassets.net/userfiles/zenifefokonovoga.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/5682557030.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6cdb37a5d---botetotutosudivijopojo.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/39629324811.pdfIn PDF document text
    • https://insp.biz/img/file/sogogukolixinidamumiguw.pdfIn PDF document text
    • http://toonesk.com/upload/58835869135.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/sagunif.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/vidavok.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85ee309a8---demekifonagoxikawokunekel.pdfIn PDF document text
    • http://aquatherm-graz.at/files/godepivejisobakow.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/kuburiwojijekugexagijag.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dijafawuto.pdfIn PDF document text
    • http://fkhd.cz/data/img/wigodotugavagij.pdfIn PDF document text
    • http://tjtvina.com/Upload/files/semorumejamada.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/12036499007.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f22785c7c2---manojofefosidufoduwu.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/66877214601.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/70892999318.pdfIn PDF document text
    • http://caramelitos.sk/files/tojeginatenos.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nulaz.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/janemurasobu.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613026edf1956---3815949894.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109121846233628.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210903_3D13882504A90787.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/jijamojularexitafod.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/vasisijuzofepikame.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_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 17060 bytes
SHA-256: 48f133f350386d9254b250a245e24b8e323d15e791d356c80e95875e227dbe3b
font_01_sfnt_off00012394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAB 10864 bytes
SHA-256: a50318a96de044ad7a615e4e336a4cea4bbd965f704c6a7abb9f70676c3c2c00

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