Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93323ad6e8e24f3…

MALICIOUS

PDF

48.6 KB Created: 2020-11-02 18:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8c59e396bb65b2b6c39662bbd2c87f1 SHA-1: e98ec652e27da99387e28d96a7690fa5aa23095f SHA-256: b93323ad6e8e24f31c332c7c43f36924345fb7206ebf22748d7b5c0cd2f493c6
222 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Amazon, claiming an account is locked and requiring immediate action. It embeds links to known malicious redirectors and a link farm, indicating a phishing attempt to steal credentials. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links points to a credential phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/1110251.pdf.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/aws?keyword=email+stating+amazon+account+locked In PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/1110251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f88ddcd42df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f97acf6b9edc.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/9122198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5fa00d1203982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0496/7084/files/iowa_american_legion_districts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3442/3708/files/percy_jackson_last_olympian_audiobook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7847/4664/files/43032543023.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/urolithiasis_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/stock_market_indices_in_india.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 5232 bytes
SHA-256: 8668709b9ad4bdeaf264db1c7482ecd3ae13d62a2648b292b83f62957d9f04a1
font_01_sfnt_off000090e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E4 10816 bytes
SHA-256: a0f9bd972af1b1c107b57326a8492201865bcca705047446a941ff9344ab67a9

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