Malicious PDF — malware analysis report

Static analysis result for SHA-256 b986ee738f7690e2…

MALICIOUS

PDF

89.0 KB Created: 2021-07-18 11:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d837b6b7d4f899c50b5e9f0aeddfc9ff SHA-1: eebbf5dbf82c62ba9cef954964a727766013e993 SHA-256: b986ee738f7690e2a1637f4b0af508c35ddc5db5f8f470b484c70370b3d86e21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm or phishing lure. The presence of these links and the overall detection profile strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30411d9666---bixedobexo.pdf In PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/jovubugomimedapoviwawope.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/5ca77b68331bd04198c337c073dab4fb/42892930996.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/16772467098.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/34207109855.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/meponufofujogebovovudezi.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842e77f5a5---76116536839.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/8b205ba2f3a37695c9db5ebdaf3db77f/fejafawijakaja.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f09d7657b0---13933639577.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vavogajabukarurokesitele.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/palujis.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2719d673---88242490551.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e9605ac5---zovirake.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/076bd634e14a1482745a3a07777df058/46867458314.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f1cb659079932662dacf52ee7960448a/86248292175.pdfIn PDF document text
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/patepavetumefab.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/6d6d11a36704843f0b204261832c83bc/40947508221.pdfIn PDF document text
    • http://aptatravel.com/clients/4/48/489dad2d2d8436d4c085fc0ccdc2d1b3/File/32282692518.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/midameze.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/7ae8e6e20da0e89876791bacb17ccb46/91001358456.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/78d39c706e502b1ca7030605dcf90ff0/jazafuzuvaxekeva.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/3ti1jpg67eftonr527i5fgkav6/guporivox.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160804cab3e87e---37834302010.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/74549158029.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076f718712ec---refejezalesixodojoserebe.pdfIn PDF document text
    • http://standardamulet.com/files/files/tixomufunavokefotatadasit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+find+consumer+and+producer+surplus+from+equationsPDF 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_off0000f2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 11104 bytes
SHA-256: 0d126531b5f5490eb275d86b4da21a92bc8bf548ede7d1709856b23894d3701f
font_02_sfnt_off00012492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12492 17912 bytes
SHA-256: 3f3ca6e1f0bfe4d2bedb12d68a5987573bcf126bf02c384eb3a1f38bab12ddc6