Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ee12ffd878bc2c…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 09:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a40fbdae64e707122ca29d4511274fa8 SHA-1: 98ee696c244a75b497c71fbd1b50b75d5d86876b SHA-256: 77ee12ffd878bc2c3ab35aaf45ee3e82831d716f2d7e3df412d4f4ff32b23513
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting it's designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://mylodge-naoshima.com/xojoxezajuxez.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ed48d005---16761650133.pdfIn PDF document text
    • http://rafaelokazakov.com/file/dunerasotepapibap.pdfIn PDF document text
    • http://parilka.by/var/upload/file/29927448167.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/31ae451ac4c3ccc5ee59fe48cd2c1710/memuki.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jotuf.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/hl62tjif7qnv1kqn8anlb8q706/95625273182.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/d5e2c6644ac42e28f0e4af4c4f30eb1c/mutubedore.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3434721c38---26627193615.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/bikijekeluzuxejogijofu.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/53443fe9b6fa5b0014c7e78619984214/zuwimofanirefajupuvenosed.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50404e13ed---domir.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f1155da09b9---muxulegemaz.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/towazopakasuna.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/gefipogenus.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/82980119113.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/89430000091.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d5d581e76569a0046ce186cfaffbe900/77436993921.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e3fd33abe---libufix.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb5e4d2cab---59940163988.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/40498862975.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbdfea13af---38071181759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=vba+choose+worksheet+by+namePDF 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_off0000afda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDA 16772 bytes
SHA-256: bd06c116253746bd533366708044e8cc20e601832d606c616a6368e2dd730c74
font_01_sfnt_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 10756 bytes
SHA-256: 2af2774c95d5a7830e8503f0692113208a4697588621d265636c4c7471a5c320
font_02_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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