Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cfd1944b642017…

MALICIOUS

PDF

72.8 KB Created: 2021-09-04 20:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b15ca5d95591434ba3ee80dca3dbb76 SHA-1: 5590e6c136dbb2e253bab3ceec3250996f6a4566 SHA-256: 64cfd1944b64201726fd961ecbe6ec8fb0d2259150d18322dffcd2194bbc331b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/nqok6aauho0onrpa737g60ocuh/63401218201.pdf In PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b06b1d789da403282cc75669122eb0af/tolerifenidaxivuguji.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/kajobaserejefexozalan.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609c64975bf43---purozujuxoso.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/zakefetatereranebijevoz.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/8718901850.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/d4adcedb4f7dce95fcc3fbe046728b9f/12390522215.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/52065259525.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/subiro.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/rbbcp10h2go6the85e6uaencde/dimowasekibiwe.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/c5fc2df36ad19cdfacbf13a82e167f3e/69646854619.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1af0fed7dd---95966936206.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/529c184420751607504dbfc454618b5d/puwapisobovuve.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed18e505f7---totab.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/64572731387.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/1629619095.pdfIn PDF document text
    • https://bmat.mn/uploads/ckfinder/files/68941378973.pdfIn PDF document text
    • https://sitarasign.ir/data/file/81996263175.pdfIn PDF document text
    • https://stopserv.ru/files/file/53488750815.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/morebefapojavabakuraruji.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/najejozemufaxawiboze.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/60968259664.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/lajozusikisuwu.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/6eqmcrm01a84bi3lfljtdc0lkg/70669070633.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/vuforamubaw.pdfIn PDF document text
    • http://seritour.com/rsm/files/zutob.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/64423848097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=viessmann+vitodens+200+wb2b+manualPDF link annotation
    • 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_off0000bc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC94 15328 bytes
SHA-256: 30f6937c51f2c6376bc2684895e75422a9a3635ce38a870b0ba092dbea56b669
font_01_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 10912 bytes
SHA-256: 9d67cbdc86077cee0ea576a0332a3e06dc921310c9d04d70e213ce51c749a093
font_02_sfnt_off0000fcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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