Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e764c63b29e39e…

MALICIOUS

PDF

94.6 KB Created: 2021-06-10 11:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 84fc9c4b1050c676593a6738969bfbda SHA-1: 8067b481919accb87f66618efdf648ed3f09ef2e SHA-256: 01e764c63b29e39e97a9968538c783e3aa9704969796e808c4d3a8698062a7e1
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 0.9997

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=zero+first+second+third+conditional PDF link annotation
    • http://ahdongjiu.com/upload_fck/file/2021-5-1/20210501182901381720.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f59fbdf906---polijinudonerav.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/192ujda6l5lr6u84iqcr3o7k67/17530896511.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/tekijusale.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/xanavuxilatobolajamoxul.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/d3858522b8457eb156b7ce8263917176/puguladojivonor.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/17641124408.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/sakel.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b355bea939---1007914395.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609b141538fe8---1506058689.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/c0d950c65a85dcb85196cd05cca3e5d6/46759024776.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f445b197f2---82768924917.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/sepot.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/bl16693umnrm9kkek2q7svdfgp/26948307420.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/5tdq8biavnic1271p0brjclj5u/gozasepenuvovuwom.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8971c1921a---50358159518.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5c8543e9fe80adf2474ef0de2df41f7/xoluranezokowudoxofuriba.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
    • 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_off00012a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A29 4856 bytes
SHA-256: 92b58c6c91a86315ec10c46d9dea0f818616ca4a05276fa3e444dd1389bde7e3
font_01_sfnt_off00013a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A98 10740 bytes
SHA-256: e7af2dd359a59294568012c2d7c5969896ebf9daeea29e770ee92ae79045bbc5
font_02_sfnt_off00015f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F08 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e