Malicious PDF — malware analysis report

Static analysis result for SHA-256 7647e4102f9190a7…

MALICIOUS

PDF

47.8 KB Created: 2020-11-02 19:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6d6768f1ce69baee808d6a16fbac521d SHA-1: db5725d1f3726f23758a96820887b348c0261325 SHA-256: 7647e4102f9190a7bf21f9b9adc4932a17446b20f4468d9315c3ab02f62f8876
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=head+first+javascript+programming+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5f9109dd737b6.pdfIn PDF document text
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/kobugijilagab-dejerosuwuva-domadamusuna-nuguzumaxarab.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/jivujisojumosas_nasuxigixirolu_rugob_xezopor.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/tofituwuvuxilebaw.pdfIn PDF document text
    • https://xebexusutawa.weebly.com/uploads/1/3/4/5/134502291/bunixesezepowir_soxajanemumo.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://s3.amazonaws.com/juvuwaterexaf/grand_theft_auto_5_apk_download_android.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/zijexiwuperufud.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/bogus_basin_ski_resort.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/53421316123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cbf2db-91ac-4318-a689-7eb58aefcc70/wabipurezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da76f196-75b7-4b9c-93e9-fa2d90ff1423/23586945234.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/99675868496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7423c3eb-5201-44c5-95fc-d4bc9db2cc4e/55911808099.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/53874255967.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 5328 bytes
SHA-256: 5b226270000365517285206a69d2d1b0322ec8ca335eda1a1f2cbdcf44835238
font_01_sfnt_off000080c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C5 10224 bytes
SHA-256: abb5e064d612cd594b3e221d06b25e052f3804767104d1203f00575d0ecf7ddb
font_02_sfnt_off0000a3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176