Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff2fdfed9d0c8c2…

MALICIOUS

PDF

73.3 KB Created: 2021-09-02 06:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2b46faa27a00739b074bf5a7ff46f70e SHA-1: 9003617ffeaf76a4605f3813ce9214efd31416e9 SHA-256: 2ff2fdfed9d0c8c2f2f378f47bfe3036ee4f294d04ad132365027db0687db319
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms. The presence of a callback phishing lure heuristic suggests an attempt to trick users into calling a fraudulent support number. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://clifestyle.net/uploades/userfiles/file/tazariwusa.pdf In PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff9badc4844---xirujifow.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/luwapin.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/3821868745.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9e7acfa66---25187340547.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094300e00401---xegozi.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202108291617391991.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/wunemitodurofunaragexox.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/vajebamomi.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/8725ac816bc2d6c3955fcf34779f7a19/39142193157.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210826175451168.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2e5ce5ead---vatakujarozovewasowebe.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/00ccd3db7e3e598bbdf14c3b3ae620eb/70715341743.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/lorojakegegetelimumugerez.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae4a88bdae1f17f39cedf7698d66d4b2/logogufazujos.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d3abd71fad---76812617339.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/24259122051.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160b99bcf863da---gigekofu.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/29946094670.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7bf1167de---lagobobimajowovofududuvog.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/nosugelunelikimovuz.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/71902268992.pdfIn PDF document text
    • http://medi-sen.com/files/files/80347740297.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/31548758988.pdfIn PDF document text
    • https://drlanda.hu/user/file/pozetuzugosazulukuv.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b64b1255067---96155275721.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=wheels+and+deals+indianaPDF 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_off0000beb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB0 10020 bytes
SHA-256: ca9adec5266d049f34a3408754e921bb468368f5dd174f2e99953b341ea532e3
font_01_sfnt_off0000d4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 16584 bytes
SHA-256: 9c4ab3594ca4d514404d07ee0574594baf6affd3fed815c613b6ad8d74830251