Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78ad860520c26f2…

MALICIOUS

PDF

79.1 KB Created: 2021-09-07 02:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bab6bcb9d8cb934ddf563f12e789c12d SHA-1: bb074a17403c5450e702183acebc1579b22487e6 SHA-256: c78ad860520c26f233464af46352c0e7aeb282dfd81f9ce0a287991565f49ad3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=guinness+world+records+gamer%27s+edition+2018+pdf+free+download PDF link annotation
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5c7ce38f2---zovavororatud.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a472604b---tudisozubuzupuxapemu.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9089d8b970---48409586812.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982d9032466---95494783587.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/29527006123.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/71770982996.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/bulimupenukefutop.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/8860079420.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b80eac7b399---xapewinitij.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/gokejidajijiwabik.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/bawikusorizimivuje.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/babajuredi.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/25278156733.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/vogimutasakukeg.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/79356760749.pdfIn PDF document text
    • http://midospa.com/upload/files/80737174747.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/7c081b47cc2bc72d445a2bd8eb7ba753/64652396931.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/288546306.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/26133711357.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/qf3j8fg2jm5vmaqqj1kirtb0b0/87286958421.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/64667778216.pdfIn PDF document text
    • https://wrd13.com/force/file/2677640721.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb00ff2b669---65883861988.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/dewafopegiv.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_off0000cbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDF 17576 bytes
SHA-256: 3ba9bd35af0910736a01a0bf8e8b799b52eb02c9faa553bfbcc7c140ceb248c5
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 11724 bytes
SHA-256: 7b27ed6858734076ceb06796fa0f04ed28496008f6fa48694f3251fd3c122c24
font_02_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.