Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cabbf536c33d5b4…

MALICIOUS

PDF

44.4 KB Created: 2020-11-02 14:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b5db4a036b7f1fe1988224b5c487dc51 SHA-1: 29b8d4fe861a9d93de4a5228d74c8c5feed05c0d SHA-256: 5cabbf536c33d5b4261b49996a92abe7c25374208763d9e3fd4efc23cc8b0e06
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The presence of embedded URLs and the nature of the heuristics suggest an attempt to drive traffic to malicious or spam-related sites, potentially for SEO manipulation or phishing.

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://ggtraff.ru/aws?keyword=free+jordans+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f94a03cc659d.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/117a1180166.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/wotagajinobuful.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/6a8bf003ade76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f875c9a62ac7.pdfIn PDF document text
    • https://ribobuwatefinu.weebly.com/uploads/1/3/4/4/134469587/duzevilutejab.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/400c125e.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/sojebelevenex/ketogenic_diet_meal_plan_for_weight_loss_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/29097096161.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/54322560348.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/61707813906.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/promises_to_keep_jackie_robinson.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/gimirexejalirawev.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/3d_racing_games_unblocked_at_school.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/beantwortung_der_frage_was_ist_aufklrung_immanuel_kant.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/brb_cable_technical_catalogue.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_off00006f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2C 4852 bytes
SHA-256: 3e326a8e2cc2438e575b484d4f092a8e5a98a1c9b1470f257ec533debe2a454d
font_01_sfnt_off00007fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 10828 bytes
SHA-256: ea473580020506492237ca4255872b05b315abe42ae88c193226e10280a08770

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