Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba402a761968af0…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 14:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fe5cf1addcb767f948f052634f3a698 SHA-1: 978529b903578b03d2c66b8b91cfa25046973813 SHA-256: 0ba402a761968af021ddcb7b5b5af49b0c5b57bdaa95304b2895e43454d0b890
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to numerous compromised websites hosted on disposable domains. The primary goal appears to be directing users to malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886270835d5---busuganofokinufibugapagi.pdf
    • https://khabul.mn/mmpa/userfiles/files/31154613015.pdf
    • http://kiemtoanhaiphong.vn/upload/files/sozaxukedovatikev.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160839d3ce793d---gekonemotupuk.pdf
    • http://www.centralperdana.com/file/pepup.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/mj19ji6pfq6ov8f5u95jmo5qpq/xigogezot.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/suluufavbviq8ovqs465ievoj4/fugeg.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/78d1a7bdb5ad088243a7c27af7b697ab/66493807938.pdf
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/327148448.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/22683b7a19d724a96c385c810b958c4c/xekubibesi.pdf
    • http://soles2walk.cz/data/file/38856308549.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/66598997179.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80fdd2521b---54707081975.pdf
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/damewetutetepur.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/aqh5f0ueg80t1se72ql3l4knd6/77819097467.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acc662817b2---20321249099.pdf
    • http://bassbasement.org/userfiles/file/58629750923.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607877711f137---18724642720.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/ashclmsefo4hfnihgduoucknfv/rufuliwumuruvitom.pdf
    • http://texmet.pl/userimages/file/57160732191.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/270bad338fdee837ab96c72cb82b47b3/gumesusojumefetuwolibu.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//2354374832.pdf
    • http://biplano.eu/userfiles/files/33000403700.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ba8d0d9a828bf7762d90b2982d065f03/95631209330.pdf
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/f68c2e8efd78c08b897e66d15010a5b5/lozoke.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=your+friendship+quotes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c6.bin
3a0084dc1a506fa241e38ccb4d4f1abf39bc33fcb311b386862c9f760dd9d0fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 10616 bytes
font_01_sfnt_off000110bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110BD 16792 bytes
font_02_sfnt_off000128cf.bin
2693a1caeb36ce3230aa3abe4881496009a1b1c81e7de6183764dd5341075a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x128CF 16468 bytes