Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad180da3ff8a8cc…

MALICIOUS

PDF

88.3 KB Created: 2021-09-04 17:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4cf17aaa2493605b857f6413fd9719da SHA-1: 144980fe15aedd71e143af2ae3f588f94632fde5 SHA-256: bad180da3ff8a8cc38fec35b345706dc9d5f267f53cc80e4953824c036ad23d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a ClamAV detection for a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of external links and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d966413df---kazoj.pdf In PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd5172cc9b---pegubex.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/82703924984.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/pijevin.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/b27a34eb8c337b8c664ec25a5d02789b/bofaporavewopuloru.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a96d8ed0c30---jizuvo.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/91953142613.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/wadusiwegozulizopamile.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/raninanupifosidesopo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/6b4fa403e65ab57c91735ab2b2788791/gomojawedutarag.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0124a904b---govunajej.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844af6b883d---fitujama.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/d6e11cae3921c481394542c7b74504cf/vetemeneda.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a26d7c65c---16465971454.pdfIn PDF document text
    • https://nhakhoaanphuoc.vn/uploads/files/rovezomoni.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c652cb52d---2450301012.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b24ea5cb18---69490643340.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd3e25715---rimatutokomozuvol.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/fagimunuxufubofojeme.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/fodatepubojivirat.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/es5elmmqd4bbtp5k736se5lp6n/malovazimepinixijidoloke.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e97bec403---dixezaludojisuripedefiwub.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/zoxelarosidetovuxuk.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf84585b73---10238395047.pdfIn PDF document text
    • https://lesura.net/userfiles/file/tegefalilugivib.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/nivozekemimovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sullair+vacuum+pump+manualsPDF 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_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 19212 bytes
SHA-256: 8c0c4c99a71ec6d9de398f1ace5e4b8c4747f1ea3c8e314045bad3753d459c28
font_02_sfnt_off00013a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A67 10428 bytes
SHA-256: b5d7d5a32c368d14fd40c0af641810bc7ae45db14daad04708b3dea43a2d8da9

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