Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6bfa2c7e49cee0…

MALICIOUS

PDF

85.3 KB Created: 2021-07-02 03:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f59af90c7be4d0d226b34c5ab76dd4f SHA-1: 4576869e0784591092c76a0735b22b4fa39d06d7 SHA-256: ae6bfa2c7e49cee08bff4b4ef85cf0aabc07eccb499aaf24b3ae9e7b094e7fc0
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which host further PDF files. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2fc68eef1---dokijal.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/9cedc91645db7bb81e05396be82256d3/78440005880.pdf
    • http://turagent007.ru/userfiles/file/84175363008.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/46b78ba840cb756b44238e452a5c3095/muridonozexevof.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a1c72a755aca2d7b69aaa6a48cf7687f/15907982016.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a28ad14028---32860294968.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ff91c929d---48539536990.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/8d9ec027793b97f2447e7cd160fec718/5649136759.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/p9d0l1393p7ebptjhfp466fs23/54441310139.pdf
    • http://tort-art.ru/userfiles/file/92745897732.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/5433e94cdeaf0044bfb2ebd41300d0cb/jarutadigugakod.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa8b68d72---zotuxixurokukojesin.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a7vfrd3733tnlnlk3aotm96rem/83263613327.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7a70cco3e3nau9b9u34brj8753/gukesiraxopepo.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b33b37f00e2---49904286097.pdf
    • http://softwarefactory.nl/images/file/9665941756.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2ced3427c---10473378649.pdf
    • http://edgecs.net/documents/2597425248.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/o8dpke51lkmaq1nmp3bejpvl5s/tibaxetevobegogewonogupeg.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080426420cbb---52631809828.pdf
    • http://palami.by/images/file/sabinuneb.pdf
    • https://retta-bg.com/userfiles/27869873797.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/c0ta9rg1evio8ighh9bsbldnhk/nufezovewum.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=2021+happy+new+year+images+hd
    • 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_off0000e81a.bin
40af5e40e3450c0e8348b0f0c03192ba75f9aa4f4002fc3c89f0d60510cd8fe9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 17684 bytes
font_01_sfnt_off000116a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 16792 bytes
font_02_sfnt_off00012eb7.bin
cd839a7e6bf10a4154df592cd8055d242a6159bac901a5ad9149ee7f4cf050c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 10972 bytes