Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2799c7ee92a3ce5…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 07:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aa0196fff0f8f0aa2cec73c0626a746c SHA-1: c6cc6fb5bc9227bd8f88a65453932a7bc48bc2f6 SHA-256: d2799c7ee92a3ce56f3af8e3c504753506ba1273091596f969d3fc79019c781e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=crossroads+and+cultures+volume+2+pdf PDF link annotation
    • http://villalapinetafavignana.it/userfiles/files/levexose.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/869afa1a6aee341cd973d07c521f80fa/67767542532.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/86998210285.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/luzamaja.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/3631828197.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/rogemewonagaranekadujove.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/90360461954.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/fedamubiw.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/28563731756.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-12/20210912202651806774.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/temow.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/61735759507.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/04f890cf2c64584c0fd7e4a40fcf1da6/82214958523.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161468289d1b83---90470860273.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109010218291664.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/2418917736.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16136742de5752---wuvudetodoro.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/zejiwavuwemisujipafegenur.pdfIn PDF document text
    • https://iword.de/userfiles/file/benabadigugojupata.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109091007462505.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8b175f650---nazefibaxirakiso.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/58047488695.pdfIn PDF document text
    • http://fivelscope.net/fckimages/37154437210.pdfIn PDF document text
    • http://na3.it/misc/file/61434863150.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/gezopizitedeta.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_off0000d985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD985 17812 bytes
SHA-256: 23011372e038f1bf2c0d56c8046c5773e4f441c46f4b10127f25368ab997f7d0
font_01_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 11004 bytes
SHA-256: 87af9a07d07cab2bfa2a8ff8a1ab386d58dbc7726f65ef51c95b91229462560b
font_02_sfnt_off00012128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12128 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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