Malicious PDF — malware analysis report

Static analysis result for SHA-256 79766e287a23de55…

MALICIOUS

PDF

78.8 KB Created: 2021-09-21 07:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 402e150e5e625ee4e8c9db8be1f9a1e6 SHA-1: 44c3a868934ddade333d97e3ad897effd55cde27 SHA-256: 79766e287a23de553b6365f317283d111ca1577b8a766b8ff504bc3808731c7a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The presence of 'utm_term=phantom+forces+aimbot+script+2020' in one URL suggests a potential lure related to gaming cheats, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://upbfassadenbau.com/upload/file/jijufajasajabidudolumen.pdf In PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/foxuwuzulewufuvazowesefag.pdfIn PDF document text
    • http://effekt-film.de/files/file/21845774514.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/wanavokev.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/50c6e3119617760a528db7bda3df3661/nigonunaxakamegakisuragi.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/11360684255.pdfIn PDF document text
    • http://adveotec.com/img/file/68115600572.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/pusozaxazironeb.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161394b34abd3d---wulomukomosasukorelogiso.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/74830043651.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/dugemo.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/52259467595.pdfIn PDF document text
    • http://nyt.jp/p_images/resource_library/file/66380135836.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/42719438071.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tijonemediwisoleru.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/12828696892.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/51589602364.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/44518357662.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/88251493817.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/70934762825.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/895ea7a28dc1ce86e47fe4316a519c82/96475219016.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/fosojumesexifepumo.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16147444085672---baseguzuvifil.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/iipcmglcrs6jhnkcp1flu7ioq4/pabezuxevuneridubepisa.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/raxuvafanoku.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614912533a2e7---vujalomexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=phantom+forces+aimbot+script+2020PDF 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_off0000c825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC825 19548 bytes
SHA-256: 31a9541df4f78d129b43fc87156898d321d1ec442063f22c06f154fb6907d20d
font_01_sfnt_off0000fbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCD 11080 bytes
SHA-256: dc7cddc0a05fc5ffeb048146e6bc4d3254ef82a031de01e7a5dca1468b8663e7
font_02_sfnt_off00011540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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