Malicious PDF — malware analysis report

Static analysis result for SHA-256 3626a20063f1df59…

MALICIOUS

PDF

84.9 KB Created: 2021-08-23 13:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b68a780075991e10aa6d28a1d44e453f SHA-1: 8c0c31cc7832621ac9d1e762b0382f0e35da5a64 SHA-256: 3626a20063f1df59aaabf7b1879ac81e214dd2ffa700c2f2ab6f4e809cea0629
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pixomot.ru/uplcv?utm_term=where+to+stream+how+i+met+your+mother PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/aa7399846093307904526f201184c3f9/linamotawupopagosunipu.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/68400460975.pdfIn PDF document text
    • http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/66857391794.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/tisenenozidebugisala.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/42vdcmfqd18c9q32b3ddaut1ap/gonemokuloge.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/gasavizapeba.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ec989db3540---lipuwafemawobomulil.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/696341e1090ff3c11dc6b732a57340fe/43827449952.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/japotinabunejupa.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a99f4d946e---88291695417.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160794b5b202fe---madudugotagufuduj.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/41480563037.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160abf75f0097b---33819526586.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6e69e930a9c20b1ff16ce41b7997fc70/38147150194.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/lonanadebaxagutibomu.pdfIn PDF document text
    • http://2440027.ru/upload/file/43119593754.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/kimuvivudide.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768d04e0318---tepasufejadafiluxono.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/35300291338.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/91671015195.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/zewonujogo.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/fopiko.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/15e5a0a4333244eda6866744e552065b/66896202352.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/69985379117.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_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10516 bytes
SHA-256: 4b95b55f967ece8f4aefda02d41d902a1d565b793fd82e7d061830a9daea8a03
font_02_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 17412 bytes
SHA-256: 170afaa8dd5fe7aa063bb919195328bacc3f892a1a75c22a0f9a8a9545f19c7a

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