Malicious PDF — malware analysis report

Static analysis result for SHA-256 202d71f7db07dfa5…

MALICIOUS

PDF

87.9 KB Created: 2021-09-24 11:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 694004d2da550e0bead45ccd6ca66a67 SHA-1: 54c0a7c695434894f4e53205f9d6f65aa4d876d0 SHA-256: 202d71f7db07dfa5a7be6699b180c1a8dae3662e6e1026d5c208ca7d108fb332
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • 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 https://langumeistras.lt/i/File/tepemilud.pdf In PDF document text
    • http://mega-gold.com/userfiles/files/zugelufudovagagexijapo.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/67991056811.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/59259770595.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/8356534075.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/xupezizemefamolasira.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/zakosufebalugikibegizo.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210902142230.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/56974951737.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/19803758712.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/lugun.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/43718719175.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/47088229675.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614b706def0cb---4731171199.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/735d0fdf41120a2fdaf903c9a5d17bb9/59345722977.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/lukumu.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/44732335262.pdfIn PDF document text
    • http://scsychem.com/upload/files/12917427843.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161498f502de95---patijajesivetowefedumoni.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210910001340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=hack+magic+tiles+3PDF 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_off0000f34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34E 10504 bytes
SHA-256: d2eca29202cc4c9abbcf1bcadfaed2f5d916b1d8e68a5aa23a0ac3a91f029d50
font_01_sfnt_off00010b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12355 18380 bytes
SHA-256: 06b86677b6caea59b32dccbd1b260c524ac3359f0d1ec77412c7a46a89bd50d9