Malicious PDF — malware analysis report

Static analysis result for SHA-256 200338fe93431533…

MALICIOUS

PDF

78.7 KB Created: 2021-09-21 00:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 765487541442c09d7de12f5a44442090 SHA-1: 705a58396486f6761d29d6a098d5b41d378def06 SHA-256: 200338fe934315336d215859df4a89720d8303efe280f6177662eff0f3526b31
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://masterkontroll.hu/ckfinder/userfiles/files/damuwoxasafetiwoxubu.pdf In PDF document text
    • https://buyafranchise.org/files/files/jatebad.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad99232656---kogukanutitinod.pdfIn PDF document text
    • https://promoform.coreform.it/uploads/file/18054844388.pdfIn PDF document text
    • http://zenkatsu.dk/files/45850017452.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/wavekitenanagibudifoxi.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614388be36209---firen.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/gamavur.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/41853247200.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/90838684566.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/8154040951.pdfIn PDF document text
    • http://lawngo.net/fckfiles/kinajuletevorijilidin.pdfIn PDF document text
    • http://gardatrans.com/content/Files/jofasir.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/33749264742.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/razexijevogiru.pdfIn PDF document text
    • http://rafaelokazakov.com/file/65862291309.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319d100b3b7---6695478176.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/guzesijobin.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161487f00d59e9---16383980736.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/21985801362.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/50011856106.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/36575095952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+remote+apkPDF 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_off0000cc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 10412 bytes
SHA-256: d0b430419b28340bfaa1b1dfeffaf071d9d4bfd4bb7121d61695e790adc8c1e2
font_01_sfnt_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 19228 bytes
SHA-256: ff9729da6ca8d8304ad9b9d06300e4b73ab4791f3296583170ff920e0e38e72a
font_02_sfnt_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1