Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48c2b085dc1b398…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 08:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbe875f48290d06b062c3fc5f40e2b2d SHA-1: 0a5dd85848167735569874399f7aafdbe3474796 SHA-256: d48c2b085dc1b3986abf46d8d451af17465afff8489532f0df48a8687858d361
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farms points towards an attempt to obscure the final destination and potentially exploit vulnerabilities in PDF viewers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=winning+at+roulette
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ccef5f7a95b---kowuwixedegukasafoxolixan.pdf
    • http://lmyc.net/clients/875386/File/xepolezirosexuwerirew.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47fe4327dc---81221040097.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737cabad5c9---puzop.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c082fe7393e---25335940740.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8d6b898a4d633e8450350f51d60a5ced/36160981959.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/68c5e36d2a17c7bec3461991474f6702/14676531653.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1de3fc91ef---jugoposugalizo.pdf
    • http://aedelsur.com/contenido/files/11989775505.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd059eb87f---36149723972.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/318d1f7c4f3a0645dc1555306ae28501/40875390462.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/15a4c45ee95f847b7a57734195d73636/46688425917.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/b01getposs9etij1u4bjlm5knb/diwelinojepukurixuk.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160842695ad36e---xulukivatewejodira.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608540089ca29---wozideladuvironoxinaz.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ce023ba293534779a430c923c63a09ef/tudewutelo.pdf
    • https://ph2020.org/FCKeditor/file/50136381317.pdf
    • http://iziusb.com/userfiles//file/84473745486.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/597c299c0ef116d4176cd1dd7d534ce4/84130516376.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/b59d30c6f84b5e19d354d9ee46e1b18c/84635142479.pdf
    • http://narcisse.sk/editor_uploads/files/notokobomove.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/d2l3369lv6hmj6vu535guededt/98381213407.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a48f4c0249---51930293182.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82f.bin
fb8b7152a7cab1dfec9b44865445abf846b5557979284a48d3531e8ac679df8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 10208 bytes
font_01_sfnt_off00010f34.bin
7c1a664d578554d095a2d180e9b58bb05b51b53321ccd5da56aaf7f8d5f1674b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F34 17588 bytes
font_02_sfnt_off00013d34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D34 16792 bytes

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