Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab6d1d1d789e7f4…

MALICIOUS

PDF

83.5 KB Created: 2021-09-12 03:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8167c5205138ebf68afe78d8412541c2 SHA-1: 3560d1af543fc1e566c8efc69262e59acd7cd5c2 SHA-256: fab6d1d1d789e7f4e9a468ae394ebfac12b5d6cd49fd315e75992b60b38bcb85
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous external URIs, many pointing to potentially disposable hosting, suggesting a link farm or phishing lure. The presence of an IP address literal in a URI further increases suspicion. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=al+sweigart+python+pdf PDF link annotation
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f55a8bf859---fipitojovojo.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/dunusejabovirazosagok.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/37929785063.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/94529081591.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/gavepubopobizis.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/85648226232.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/fitig.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/12144430959.pdfPDF link annotation
    • http://pc-driver.ru/userfiles/files/kalunekofebisomoti.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/55294276879.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d079ded566---28675736410.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/72215135485.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/mumelamelanojozi.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/85027707868.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/49122169026.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/55826769323.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/migedumonajopudum.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/67455035049.pdfIn PDF document text
    • http://telektrans.hu/editor_up/19649510741.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/11574316081.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/13617941578.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/kibatumavutusanumel.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/78556963683.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/lamotemazakeluzuv.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/92664074678.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_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 10956 bytes
SHA-256: 44369a0226c76ec23b14752c2ed79ac72dd1187a58a666b56eba6f319d3cf2cc
font_02_sfnt_off0001136c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136C 17364 bytes
SHA-256: 7cfb4159652c9373bcf0ec5485f768c939803c5b3b3e8a7584cf7bfe823bcb48