Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eda0744b9aa844…

MALICIOUS

PDF

73.2 KB Created: 2021-09-20 11:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fa9697d8fc5cb6e6295ce1f7d6b4971 SHA-1: 0eac46cae19f7bde64e49be26f1c6d864710a956 SHA-256: a2eda0744b9aa844ef27c9dc43e4e3e205c09494cc42ede3370020c104e91492
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external links, many pointing to PDF files on various domains, suggests a link farm or phishing campaign. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kenadong.com/contents/files/6826838327.pdf In PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/dagipozojip.pdfIn PDF document text
    • http://888chji.com/userfiles/files/togabun.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/rakilepizizanikubese.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161352872ed6e8---84951290040.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/89052568004.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/pavirinuvanuwurezebowiba.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/613fcb0b065e0.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/fawuz.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/dowipudaneditabivum.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210918125954_NzgyNTM5MDMwNzM=.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/63199084877.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/xokedawefenuluxaduwef.pdfIn PDF document text
    • http://stefani.cz/fck/file/xadokuzabidemagonoj.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/19261134186.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/geparasaveworunirekokab.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d77eeee0f---19475080907.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/65264158748.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/83757115142.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/megovasorijigo.pdfIn PDF document text
    • http://cascad-trans.ru/files/3312881420.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/35315819121.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/sapegorizezexamigi.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/somanodujogivedilovasax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=watch+parey+hut+love+full+movie+online+freePDF 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_off0000ba2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2F 10848 bytes
SHA-256: 9f76c371402c06c8b9ce2755616874c96ffe8cae8f40294f0c4b18f8dbe62ca1
font_01_sfnt_off0000d31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31A 16844 bytes
SHA-256: f8805d3992fbcf09a5dc3fbc4026501fd35e3e1920a5d4f68d97230d0d47a0ba
font_02_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1