Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c5899a2608400f…

MALICIOUS

PDF

99.3 KB Created: 2021-09-06 02:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 19d98202e61bc33de11457082974421c SHA-1: 223099970728b73e982be18d20473ccab1e7e724 SHA-256: 49c5899a2608400fe2dc802380b74599b440119a545d1cbc9c76cce779ac352b
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious files. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may attempt to phish for sensitive recovery information. While no scripts were directly extracted, the presence of external links and the nature of the heuristics strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://irlanc.ru/uplcv?utm_term=communication+commands+in+unix+pdf PDF link annotation
    • https://mszukam.pl/dat//file/ponuvomilufitegemerebaz.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/dubinupeforagasamunufiwet.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/94075068762.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116b003020db---8995403350.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082956873fb9---tunubexinu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093e92deac01---60409397187.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/sawapodukikeligigojin.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/10181141604.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/merimegixinajogazoxo.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/porogalojesotezure.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/04869d4e4f52b096e917cc989d08a52d/doduvetiwaxibama.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/wepujuwulunavuwozi.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/rutax.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/3232322254.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/30938495898.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878b651a442---xusadoreroz.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ed1395d56---nefopopiderazubororis.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/wevariletorotetomamob.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/toxeva.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/sanananafow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b018af651---27815277946.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/juzuzuwamo.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8e2c67928658242a5c04fe5c9dca3fc/56043380036.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/275596b8873862346d89ea852bc8ca7d/4023426668.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/25416511849.pdfIn PDF document text
    • 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_off00011bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAC 10736 bytes
SHA-256: 9997a2939ba07f6a1714765f252a3760609a81b1a44a1808c887dbd114bee744
font_01_sfnt_off00013469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7B 19272 bytes
SHA-256: c9f088b5e4ddbe2c2a67b83a8a3307b76ca9cab37de59351ae0ff7f9807c3c84

Open this report in the interactive analyzer, or submit your own file for analysis.