Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedc94a7c10053de…

MALICIOUS

PDF

83.6 KB Created: 2021-05-21 16:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0670e59c18961be88843e015adf90b9d SHA-1: 8e12a784be0e8031be67448afed66a149c3ee048 SHA-256: aedc94a7c10053defc0793244a235fc63502a0ca942dba4fa0d78eae2e76ae6b
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous links, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious or phishing sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/rbubuaa1t6k8iettpam1b989md/26510871488.pdf In PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a1979a7390b---bugigevatikuforu.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/3fdf197cb06fe03b7c3e6ba88ce0af92/zixusoretadebaxizonemoz.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qh3n6ol6pj86v469ljbfn7ls90/tozoxutudamadoxizapavar.pdfIn PDF document text
    • https://x-software.cz/data/file/72248080172.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/75668672936.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841567b98bd---woluterudoga.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed7a686511---rorobagozes.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160940502511ce---faxikazifokura.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c4ff6d3af---69439627390.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985c30690fe---57954946406.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9pjfnj5hip3bt372a1beod2l7/mewawizujitokakegiwulor.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/e50deb68d5e12017daef66f0947ebbd4/24712481509.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/wuliko.pdfIn PDF document text
    • https://banghenails.com/upload/file/2088499610.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/84143a4dc529c9565a7b3e2a0c62e2a1/57881413155.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/GLLx1DTH0VQ/uplcv?utm_term=what+can+you+win+with+monster+tabsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 5236 bytes
SHA-256: 6c2f918f34d52b29027a150601631115524c1b9f2a45074a01a4bbcd86f4402d
font_01_sfnt_off00010db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 10908 bytes
SHA-256: d0af52e3ad279009aa007c65ef2c750a243584e2f830b833d1865294535b6a0a
font_02_sfnt_off00013332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13332 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361