Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5603c6c433a19fe…

MALICIOUS

PDF

45.8 KB Created: 2020-10-16 21:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3cb90aa091cbaeaa3f485b19f96c24b4 SHA-1: 83274d360fdb97d9b48c63ac7b33b2297f92622e SHA-256: e5603c6c433a19fe9a6ce46068e230fc3f1eecc06cf8851a2823ead25f9542fe
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 redirector to a malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of linking to potentially harmful or manipulative content. While no scripts were directly extracted, the presence of embedded URLs and the ML classification suggest malicious intent, likely related to phishing or driving traffic to malicious 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://ggtraff.ru/123?keyword=https+%252F%252Fandroid-1.com+my+talking+tom+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f88d847df460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f87e63f2eef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f89dd6d666e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f86f84b5fbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f880d368e740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f8822edb79be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8996dc26bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f873f3c56c31.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/fuziwakirub.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/3230146.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/6f3fe19.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/5426e4f5.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/0cb5eeb165093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86ffde8176c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f873cacbebc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f891e6d50bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8715ac25799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87229c83045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5f891ab6ebc9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f88d7a59cb54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec620040-b6ea-4c6a-b075-29af2d673607/wusimiludirimizozel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35aff825-b04e-4e8f-95f7-6c67cdb6b6be/4591178889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7e9fc0-d910-40bf-aa7c-5a1448092b70/59318432904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7e4a32-55f9-457c-bbfc-d308c82b7705/64135618344.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_off00007163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7163 5804 bytes
SHA-256: ae054375138885ccc3dee04bb6be2ab21c5cd38fdf6e2c1b0777c6b3f4091fda
font_01_sfnt_off00008528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8528 10488 bytes
SHA-256: 18b42953b4976221320540a52a24d93c4b942fac5a2ad1a2bdf5ce1941a476b8

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