Malicious PDF — malware analysis report

Static analysis result for SHA-256 beea64e40e8579db…

MALICIOUS

PDF

95.0 KB Created: 2021-06-22 23:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d16a796ee123ba6c0e931b56108143a6 SHA-1: cc613462739fb5786160cfe8e5a0832cc7be21be SHA-256: beea64e40e8579db13e9aaae10d3ec2d41e75ae0c484dda235b8a9e6c6dd3f1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It functions as a link farm, pointing to numerous compromised WordPress upload directories and other potentially malicious sites. The document body is heavily obfuscated, but the presence of external URIs and link farm indicators suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://hpworld.hu/data/pic/Image/file/xipagirelodogu.pdf In PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4360cdca33194045319b2ece72ae3b4b/levabibeleboxofide.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/6457e4bf1fd6217297acb966de602557/22598019638.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/nenelokavetogisofib.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/bilefajurovuxifimipaj.pdfIn PDF document text
    • https://abeess.com/userfiles/file/57629098981.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/9em8rj0n25m705rk3mf1icliq5/xifewize.pdfIn PDF document text
    • https://artbynela.com/uploads/file/49187382082.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/6p5259r4utsgcib2fh33veus6s/liduvi.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/xufusegegisowuvitebotux.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/tm82i62ker4jb52tvq035bkh3c/wajezurimawusilafojelo.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/4c343fd51388ad1202690eff027bfc57/70454497513.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a921339005a---nevomewuweretabiserokupom.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/daa571ec5b9ba79fbb30358ebb434652/bikebuzowatejovigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=clash+of+clans+bases+th9PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 12696 bytes
SHA-256: e9dbfc23c08d3b37fcdd41a75035340a7522160b18a9a478ede90b932a2e8fe0
font_01_sfnt_off000128f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F7 4932 bytes
SHA-256: 7c53e6d05a0d3de222e6a6a908d127e8ec2a12a911b02877ca950bd4dfe00db1
font_02_sfnt_off000139b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B4 10988 bytes
SHA-256: d2c2660971d56fc94402304d200f4210f70fba340fb32a84958e18f597065b42
font_03_sfnt_off00015f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F64 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3