Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e095509e00341e…

MALICIOUS

PDF

85.4 KB Created: 2021-02-23 00:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d2317f0f090b73e458b3d039b45e038e SHA-1: 4977f4940934969462f85a609cbe21d2340f667c SHA-256: 41e095509e00341e50ec302393e27a5dcb30c6f04c592c09248742def426e0d8
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It impersonates Capital One and uses a lure related to checking COVID-19 reports, directing users to an SEO link farm and a redirector URL. The document contains numerous external links, suggesting an attempt to drive traffic to malicious sites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/lewove.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bologen.ru/strik?utm_term=how+to+check+my+covid+19+report+online PDF link annotation
    • http://poverkavoda.website/the_careful_writer_theodore_bernsteinjfxv9.pdfIn PDF document text
    • https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/lewove.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/1201214.pdfIn PDF document text
    • http://timecodes.net/android_adb_shell_root_permissionon4b8.pdfIn PDF document text
    • https://novagonuneji.weebly.com/uploads/1/3/1/4/131483078/2789287.pdfIn PDF document text
    • http://uggi-ugg.com/86411374194d7qbm.pdfIn PDF document text
    • http://com-connexion.xyz/buwilexugajauye.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/yNfigjd/8831954854.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/palawig.pdfIn PDF document text
    • http://instas.site/what_is_the_best_basic_sewing_machine_for_a_beginnerav72g.pdfIn PDF document text
    • http://arthromedro.xyz/basic_algebra_worksheets_and_answersz4y0x.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/2649100.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/sadiwawuxovijikox.pdfIn PDF document text
    • http://cashbackmoney.info/rakubupamevapuri0dscr.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/2397663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zakunafu/39132972396.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/triangles_interior_and_exterior_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/99198060572.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/98972751541.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/gesapesotinofixoxitu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 5412 bytes
SHA-256: 5238ddc91ab82ee41119b5484d4cdc374a80c2d14c25ac166ffcfe21b86dc89d
font_01_sfnt_off000123a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A1 10664 bytes
SHA-256: df0d58bccafd8a7c3fe1238bdc961dc8ad6bdbcaad673a350e6aa8f1f080006a

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