Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd1a91ca7337d2d…

MALICIOUS

PDF

98.5 KB Created: 2021-05-06 21:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9f5c2d05351dfce9ed503a8d8ebd0cfa SHA-1: 5b60139d4670564ebf764962c2d88df068b03573 SHA-256: 5dd1a91ca7337d2df55a5dfc4f9255f78dffb0c93a544b1b63ae1309d88263e4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL suggesting a lure for movie content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=ver+pelicula+un+tranvia+llamado+deseo+en+espa%25C3%25B1ol+latino PDF link annotation
    • https://cdn.sqhk.co/pimidima/igQjaeh/make_up_icing_cake_topper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417670/normal_6028b96782401.pdfIn PDF document text
    • https://cdn.sqhk.co/xufuwejaxe/bUjfsjg/wagevimaxawiv.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/ibOO7od/88672841.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/cF5rr8f/berixovipofulifen.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/jxia6gj/wewokenederexuzulib.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/5jfgdkh/614335600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fe79fa372eef.pdfIn PDF document text
    • https://cdn.sqhk.co/zonelatu/wchKMif/kilijejun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462681/normal_6039bcce887e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5fe8bb03a1d36.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
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_c4223e4f82ec489ca4c74a867f8ddbcb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/raguruxinisuribaxifo.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_75ba3252f3a44063abd1cc4c18390469.pdf?index=trueIn PDF document text
    • http://jugikan.epizy.com/audit_trail_report_quickbooks_desktop.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/2011_chevrolet_impala_bolt_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/75765029525.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/gokewavuvejeligiserar.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/finalize_report_synonym.pdfIn PDF document text
    • http://kawurox.epizy.com/telangana_telugu_academy_intermediate_books_free_download.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 5336 bytes
SHA-256: 6b2be3aadc359e76342f6586305797371485c076939cfa82cd05ce4e2b89f027
font_01_sfnt_off000128ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BA 13204 bytes
SHA-256: fd74534b9751334db1cb75ee65b655b736eb52e312a14ba3082aff3fb02221eb
font_02_sfnt_off00015360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15360 16904 bytes
SHA-256: d65aff76acb67631fafc73988c00783fa0c873677495efe9cd602b1a0d82931f
font_03_sfnt_off00016b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B09 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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