Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef46d1690b561e2…

MALICIOUS

PDF

100.4 KB Created: 2021-09-04 01:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 87a4947b0154488ac4f7547cd6a5ea2f SHA-1: c80762f9f3f805d48cd1807a997fd2c7a883e198 SHA-256: aef46d1690b561e2db425fd282599797481f3fce8bf510533f1e57c991b0f714
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_URGENCY_LURE' indicates the document may employ deceptive language to prompt immediate action, further supporting a phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pixomot.ru/uplcv?utm_term=aabb+transfusion+guidelines+pdf PDF link annotation
    • http://wish-pharma.com/upload/files/bumago.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/615128823.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/sonabizalupoxawojaj.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/u18glv82h50ph7sm6fvhv27nh8/53969063591.pdfIn PDF document text
    • http://teplospectr.ru/images/files/xesir.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/58837250922.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df08210caa---76517672882.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/95392433659.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/vepuwadafazotoxo.pdfIn PDF document text
    • https://castel.ro/userfiles/file/46479098744.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131652d9e194---87516528889.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb1e50740c---63987901911.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/43886287468.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/51386697284.pdfIn PDF document text
    • https://anfauglir.com/images/file/27994525948.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/96669115946.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/58180176191.pdfIn PDF document text
    • https://ms01bet.net/contents/files/10578787596.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861509ccddd---16872959964.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094db2b5ccb2---11834669492.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb416134eb---96538546145.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/16730566906.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/4pv8vsd6e0jm3nl6moev74jc7u/8375760551.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/tilururotozadegakoz.pdfIn PDF document text
    • http://zgic.ru/!upload/files/49633429683.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_off00012252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12252 18236 bytes
SHA-256: dd99a47d3cd0174e46f00235c30b774a462e67331d714020f02b2c6f7c92b051
font_01_sfnt_off0001522b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A42 10896 bytes
SHA-256: 6d0a5e3f7319eabb53b8534deb8fa5a03aae45586c138a0e4ea32fb801299c7f

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