Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a65e361fff7ab9…

MALICIOUS

PDF

152.8 KB Created: 2021-06-10 07:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 182356f2dd4fe5ca7d415d6a4cd2518e SHA-1: 01d02f6db3408580c465145908d13e22ebf5434e SHA-256: d1a65e361fff7ab9ad3bd0f7edf826f036bd700898567c9816d3c5c2eb005473
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9665

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 https://garglob.ru/uplcv?utm_term=lion+king+mp4 PDF link annotation
    • https://burlingame.com/wysiwygfiles/file/50743000632.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ea461d589e222d9ee5f80b2c63d10b4b/sofedoma.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/84h9cvqninfm9vj1i9v7c3i6v6/18513292631.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/551bae791c8edf18ca375eb642baa0e6/61952646914.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o61pcu7qtak949n1rpa8k83nf6/vizegaxuwusuluzopek.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/30b0312aeb965e354f4963772fd28b84/20714679695.pdfIn PDF document text
    • http://gptools.net/userfiles/file/63158611130.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/vivegofid.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/2b82c1b1a6203d029714e97f591e2315/fogajogazezuwovevukixiki.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609432bd1e69c---webil.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b7973be6d---vifole.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd1e356c30---82354842643.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ee8faab81e4a712a7e6877b7d6d628b/zopatugax.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/620e67d43b0d1c558a1494c8e4dde01c/51461379122.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6d53a89e1---65235780446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0002203f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2203F 21984 bytes
SHA-256: ce35da1da9acd459cabe1c22dd3bcd647a02114cdc47c1e5459f27f57df46fd0
font_00_sfnt_off0001b8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8CB 3188 bytes
SHA-256: beb93ed512a6a275cdfc379da5fb80e098b065005127c1e8b03002a8e8374a09
font_01_sfnt_off0001c420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C420 4716 bytes
SHA-256: 63010fb252e2e53c55ea3504e73e3f478cc5da964064734c2d45c90c291a4b06
font_02_sfnt_off0001d435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D435 9448 bytes
SHA-256: dfa9ff23016d6ffac10e1d7cbdff9bd5ad161d3b769c2d689fcc9146e1a795c3
font_03_sfnt_off0001e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E789 4780 bytes
SHA-256: a37b415be90b27d98b588cfeb4c34f348b36c19c247b3fda637e5744646e9802
font_04_sfnt_off0001f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F62C 13856 bytes
SHA-256: 9624530d24ad29f197337be873a5aec732665a6a7552a8b2defe08e7944d4d26
font_06_sfnt_off000246ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246AE 3488 bytes
SHA-256: b778d3e209c988ebc19f901ede626d45bd87edf8895c02dfa987277b689c61fb

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