Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec405ee8a2c0b15b…

MALICIOUS

PDF

87.1 KB Created: 2021-06-30 03:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 224476bf2255b110a92d119d2fc3933b SHA-1: c72818d9e92fafd9dd2db40cefb966a0f5289dab SHA-256: ec405ee8a2c0b15b020dcfed08532d41f67cd09a1c96aca3a60ca15fb06a0f09
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malware or phish users. The presence of 'utm_term=download heroes 3 hd edition' in one URL suggests a lure for game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://unique.global/wp-content/plugins/super-forms/uploads/php/files/50c8f23b7316be56070cfa8709fe16ce/rizaxutedepusuxaj.pdf In PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b91cb82fb67---88174868422.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/77eecdbbb69fda4b2243ba0573fc949d/12461264998.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/cce2d5563c41d6f4783ab5a54d145820/fakodaxarexubavened.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607681bd8b314---meludidoxeteto.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874d04e8e66---90923969133.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/999aea9fed0b0ce944479ed80f2cce5f/gewavelafudabajisef.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/69917174882.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/niwokajuvijetubusapume.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/gfbu5f5id1du973h7e0f5j7kul/58353741962.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88b651c1f---48685340290.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d95a04c18---xavowujaza.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/bsujcdhr66bqgif8974gqcrsrm/87280085532.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a33f9fe1667---nonexekusolafolaritigewi.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/fessi7lr0sjs62teeqt3u5v54s/xatumamekedekezomagusirun.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db246b756f---37355257683.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/budukobopi.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/24942f70ac1eb059444c950a7b455932/jubuwafaruno.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/96381950261.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e883c32a81---roxaju.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7bf2cf6433ada89f81c5c25055766d34/wigamowesarefokovagenapoj.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/rm4rfmh2lpvoutkc5jh5tpefg3/599902434.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/bexotofumazijadujufivare.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/837a2b623dc552e8fb7994fee15ebd2d/sopazodimologozumazati.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/wuditumajugupolonalud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+heroes+3+hd+editionPDF 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_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 18104 bytes
SHA-256: 1cc1ea5c656472f0a4be666a00352010c0bf4056d1233c5ec25963ebd435dda0
font_01_sfnt_off00011d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4D 10604 bytes
SHA-256: 88f5a7823fa2c86baed621e9bf01266765ffb39b7474f18d35177028ab197b55
font_02_sfnt_off0001358f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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