Malicious PDF — malware analysis report

Static analysis result for SHA-256 c220e30e5af79e84…

MALICIOUS

PDF

88.5 KB Created: 2021-09-05 10:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9560fd75e88803b3b13686ad79956e66 SHA-1: 274e400d8d449c30029decc2b14d969c82a67dca SHA-256: c220e30e5af79e84a03ea268f2f6cf8fbeb9369cac8ebefb0bbe9ea9f43df896
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://watdoenwevandaag.nl/upload/19146791773.pdf In PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2a1286cc9ce647764990ef7c2c54e3e2/jixifujagodakolesonod.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/vopixut.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c7915090b---budunulovenatapopumapam.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/rinejijumo.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612358495d3a6---jofaxi.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/c640d0517a6a3d9691afb6f0dc447f97/38108874685.pdfIn PDF document text
    • http://patroha.hu/file/33518108075.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d197475082028841cd5d5f076bf78cc/virerixipuzes.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/46002427048.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f5daed74a6f7f32076f82abe06a32ced/27420310472.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/mogokufurobaparem.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/xesurowiruwediga.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/kodoworav.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/novobexipokirav.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/44341226125.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/kiraturesizubejoxumewopis.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/1k8p37nb2h8fbqvkdbqvtr22c0/62069421949.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a355bc0b457---dawagoxunoj.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/36925296349.pdfIn PDF document text
    • http://mebell-city.ru/ckfinder/userfiles/files/vibofevoge.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607465474cf5c---99431906715.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/nm5cc8p0v403cj9fl1v279j576/66045574228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sundara+kandam+in+tamil+pdf+with+meaningPDF 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_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 20752 bytes
SHA-256: 539daaa938048b021fd2c1e784b05d1a7c3df471cf432ebe225266448461bc19
font_01_sfnt_off0001232d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 11008 bytes
SHA-256: 4120694a13d23711d95a9ac0801d5a8810e174c645491c0462a793b76c37c010

Open this report in the interactive analyzer, or submit your own file for analysis.