Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fe5fd462e67036…

MALICIOUS

PDF

94.3 KB Created: 2021-08-07 21:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0e0bc54e15caecb1b32577894c5daf0c SHA-1: d32537b5f6b3da410a7120d36711ed3b83ba0ac5 SHA-256: 22fe5fd462e67036dbad5b6e48535cab8fa739a891782f4ebdfeda0100a32c95
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, utilizing compromised CMS uploads and disposable hosting to distribute further malicious content. The presence of numerous URLs, many pointing to potentially compromised sites, supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c411954e6c6eac9ad9cfd0ff5867c214/6094079558.pdf In PDF document text
    • http://chiengthai.com/file_media/file_image/file/kezalavu.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160761f7142106---telefuvexozomazimusef.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/suvategasipomigufarored.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74899a9585---tetekanodipetonanimemovu.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/tidabugifidejone.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/33844297312.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a0790737a---vogesefo.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/36179772965.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/85356695371.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/93147236925.pdfIn PDF document text
    • https://x-software.cz/data/file/64613528087.pdfIn PDF document text
    • http://tort-art.ru/userfiles/file/megiwadefop.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/3cc5ffaf21bd0813d3dba8efb6a0d3f8/puxazuxiviginuromozaj.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da941ba1ef8---vomopowiw.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/gewojezukajebave.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/kupilikojuvigenubepolimo.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/df796de5a341ab637d1abd8da0d6944f/94001079632.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/0e461f7550b7e41c9865cf71cc75365d/14687746389.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d230dd1a51---morasokipejaw.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795d7f6da11---gatitedupufegewepogudo.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/8728559723.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=interpreta%C3%A7%C3%A3o+de+texto+9+ano+portugues+com+gabaritoPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/742df7cad4571f210399b8c7e53260fe/joparitizavevuk.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_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBD 11736 bytes
SHA-256: c56836fd94ad06efcbb43edeadfd966e08411da06f912fc5b44871e8a20e7dcd
font_02_sfnt_off000137a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A5 19564 bytes
SHA-256: 2796b60493c9986462f1491d8d643b47c4e315490c0b19b96661e4329f955191

Open this report in the interactive analyzer, or submit your own file for analysis.