Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d22e70dec500b3…

MALICIOUS

PDF

78.6 KB Created: 2021-07-26 20:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 274ba27f29b5a60ef1e3e5d4082830fb SHA-1: c04d59ff622b5bf3e3d4a9d33a614c57caa2b30d SHA-256: 79d22e70dec500b357570d5c2f1897df113f4dda3448c19f6c026aeaa0169772
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. ClamAV detection and ML classification strongly indicate a phishing or trojan payload. The presence of a download button lure further supports a malicious intent to trick the user into downloading or visiting a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/f365428de8784f101d579b437d1a5b51/sesukotonimud.pdf In PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c96f0df27---kufobikubamase.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/4954702223.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/vofinukawanoxexeratupo.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/milos.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/valojawoxovufixixirepod.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3c30179d8a14263c7bb591e865def147/47234573078.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/tavixejavejuvugepenatu.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/2606075368.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/15143598432.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/56339456630.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/85944504045.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/168u9lf25dp57jso0uikigk2jo/sabanuwofob.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/kesidorelusenatuvuse.pdfIn PDF document text
    • https://12waktu.com/contents//files/xewowazureguvuzojorez.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfc794daca---10573527848.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/muvatumevukorevubuje.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba16f250d3---11565481520.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24ff605be6---xilibifinekarojodat.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c900cc07d27---zefubesep.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/71268549056.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/76682978131.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a669b925cd9---77451381408.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5cd6282c9---puxez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=durga+saptashati+lyrics+in+sanskrit+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC611 1780 bytes
SHA-256: ee6d8c25003eb2de61ee1fda640ec7b8e4605923364b71ee832b966c85f0f81c
font_01_sfnt_off0000ce74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 10952 bytes
SHA-256: 00f6379d186d7f9f02acc099cc99f9d606db0600fb20a8081cd9f14b6b0ac62a
font_03_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 17024 bytes
SHA-256: cd891d34563b4a3f34f1a6e25b22dae747f808e85cdbb6ffcbd8195e07c6477e

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