Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4317fa457eee19e…

MALICIOUS

PDF

44.0 KB Created: 2020-10-21 23:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 247b1b9b3f7a9936c4888c7ad3accae6 SHA-1: f050961db77d70e42554c9f16f97c3292740eb49 SHA-256: e4317fa457eee19e36f8be2dc112c1728df9d8547da14fe6e3cf463552baaab6
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a primary link to a known malicious redirector. The document body, though partially obfuscated, also contains this malicious URL, suggesting an attempt to lure users to malicious infrastructure. The presence of a link farm heuristic further supports the malicious intent of distributing links to external sites.

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://cctraff.ru/pify?keyword=sewage+treatment+plant+notes+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8e88dd5ac91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_5f8cf818100ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f87318cb8fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f89ac42a1d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8a491437109.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/c9d960ca9ce4dd7.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/dogoxujegag_sunolur_kolip.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/5361255.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/duvafod.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/56487.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/857e5ff12b.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/supobimobobofozido.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/leguvefu/karpman_drama_triangle.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/anomalias_cromosomicas_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/54011158412.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/notutidowupowuvekirupima.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ralemoriropan.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/area_of_complex_shapes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/health_benefits_of_avocado_leaves.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/extraccion_de_capsaicina.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/10272532490.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/samudrika_lakshanam_shastra_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/dogumurafemigilo.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_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 5556 bytes
SHA-256: 387932f62403b87649c0349bafa68ec70a6735c01b3ddc909e4862c277c795a6
font_01_sfnt_off00008072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8072 10040 bytes
SHA-256: 945523bbd744d086a20f58685db5337b50c3cadfced47f4e41891b47faf31feb

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