Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae352f469e21a1e…

MALICIOUS

PDF

71.3 KB Created: 2021-09-12 12:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b19686e60bc79e7c23577ff828afcb41 SHA-1: 510e7e0c043bad21865e25a7b4c4d30b477a9fde SHA-256: 3ae352f469e21a1eb90de33a971de495a2a43d6b56b104fb7df9b6bb137b5e06
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The presence of a link farm on compromised CMS upload storage further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://michellenevinracing.com/FCKeditor/file/ziwenejukijineberof.pdf In PDF document text
    • http://phdpecs.hu/userfiles/files/sogemagemibezijimiw.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/nejomofuniz.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/pulibud.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613d89e29c925---54545762789.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/28287817776.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/90704158108.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d40cd1d662---dexejuvag.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109011150569131.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/69030037698.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/58027315803.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/93461509069.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/29720389237.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/19128844727.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/jurojovapetap.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/77653159223.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/wosuvosuxugo.pdfIn PDF document text
    • http://philipsphotographystudio.com/zubus.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/3239841624.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/tupiladok.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/55428060185.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/43517943948.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613924cb5b1d4---sepibop.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/rixarajugijomizedun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+pause+a+video+while+recording+on+androidPDF 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_off0000b594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA6 15856 bytes
SHA-256: 5131f14d7c911bd9d5f90e4a494b57976505b7bd769862050d654c1b187fc1b4
font_02_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 11036 bytes
SHA-256: ecd171cfa2d9b59b059726fedb226810b9aa8fe075a0459600f66a38b70a4bac