Malicious PDF — malware analysis report

Static analysis result for SHA-256 91129c639c77fc27…

MALICIOUS

PDF

40.9 KB Created: 2020-08-19 18:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4289a44a1dd1acf79ebfe6e8c6e36859 SHA-1: 4169f40bb5965c6143ec173a3fad04025594e1ca SHA-256: 91129c639c77fc274163161a8bb07c7389051377b4ca06639e3c0d6676b93f8b
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for Outlook on Android. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL in the document body strongly indicate this is a phishing lure. The PDF also contains a large number of external links, suggesting it may be part of a link farm designed to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.com/pify?keyword=descargar+outlook+para+android+gratis+en+espa%25C3%25B1ol In PDF document text
    • http://ravurizo.sistasacademy.com/uploads/1/3/0/9/130969060/jobetipanaz.pdfIn PDF document text
    • http://files.a-full-life.net/uploads/1/3/0/7/130739387/napuwusapagetupu.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/1/0431/3976/0285/files/practical_java_8_lambdas_streams_and_new_resources.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3490/0637/files/3908008655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/70631223834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/44806892768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/nonosuven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/recursos_audiovisuales_en_educacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/banking_act_of_ghana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/faa_form_8710-_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5890/files/quartz_watch_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/guider_publication_meerut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7956/4448/files/26626594406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/selinegisafari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/8862299320.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 2

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_off00005c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8D 5516 bytes
SHA-256: 53976e33d45379060f532b08bdff5165a5f113167f36327fa5c8dda7607ba317
font_01_sfnt_off00006f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1F 11392 bytes
SHA-256: bb8a5b5a53bea3df829d89692db1f9c84f43ffd99ae70d61d5b52cdaf83244a3

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