Malicious PDF — malware analysis report

Static analysis result for SHA-256 be740716e9a0807c…

MALICIOUS

PDF

96.8 KB Created: 2021-07-30 18:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cd3f647ab1882eb2cfb9d8dd4c2fff82 SHA-1: 7120084b4d8afd879595334d1e360d577af6b227 SHA-256: be740716e9a0807ce5a8506365b5021fc18364f889126fab433e444b59292eea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=bhagavad+gita+slokas+in+sanskrit+audio+mp3+free+download PDF link annotation
    • http://101balkon.ru/upload/files/35147202134.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/25954636903.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160aa685481389---buwelotul.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1b199078d---vawuzur.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/4v86qilbfkd1ch3at6hm936c5p/nilagalewiv.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bitesabogovumabed.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f7e659eed402e68e64743bee0c72acfe/wemirisoxoj.pdfIn PDF document text
    • http://xtra360.net/campannas/file/zagos.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07b88974a---39877756483.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/gezuri.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/faroposofozevaf.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/7304fc198295aa7b154cde35a1a9b8f8/xazofuwagelamewos.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/wofetela.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-23/20210523130258994896.pdfIn PDF document text
    • http://medi-sen.com/files/files/paximaxalejowuzarifiti.pdfIn PDF document text
    • https://ayurmitra.com/files/file/77901761215.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071d7dd20dc8---purumikekog.pdfIn PDF document text
    • https://saam.vn/images/content/file/51978549455.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0d89fddd---72567214084.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/24403423ffd744919f9e973d2afec0ab/xugasabodidivu.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/52de7a344722c22b9000a53fa2d57acc/17352891435.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/29a3e2ebefef30f96547236050bb4d2a/nimetadaw.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d7e88a04---68922686834.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/16322902999.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076088142929---66695743671.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5fe6df592---natufoferexo.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_off00010e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3C 19920 bytes
SHA-256: f5b1512ffa8b3232a085522f0ab56170496b0b1f01763a455304613a53bac61e
font_01_sfnt_off000141e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E6 11512 bytes
SHA-256: 8730698094256c0b1dc91fbd172e8ed89376d0bea4c981835be1e5c03e1186d5
font_02_sfnt_off00015ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1