Malicious PDF — malware analysis report

Static analysis result for SHA-256 683451f104263ca7…

MALICIOUS

PDF

82.0 KB Created: 2020-11-27 06:18:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6f29eb8d4e7c22a54dd0314d97ba510a SHA-1: dabdfbb6cb80e71932b7b29128e5f801521adf41 SHA-256: 683451f104263ca704e5715266c5dcae96a1160d34b1791a5c57afe02b38e645
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, such as 'https://ggtraff.ru/strik?utm_term=carrie+2002+movie+clips', likely lead to phishing sites or malware downloads. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=carrie+2002+movie+clips In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_5fa76188e8701.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/9752e3beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_5fb5e71bb323f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_5fbeee4827921.pdfIn PDF document text
    • https://gofubajub.weebly.com/uploads/1/3/4/6/134632898/tajurat.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://uploads.strikinglycdn.com/files/689a4b98-327e-48d0-a7af-e1434d09bfd4/99701040835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9466efc-4a2c-4b5a-bf51-cc3a3140b50a/11069954687.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/pink_formal_dresses_for_13_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c7b5e9-c897-433d-930e-bec617c56fcd/15846358618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8ae34a-2f85-4fb8-b1de-7d11524b4127/heavy_rain_trophy_guide_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/dibosesipikazawobumaxib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fc11f8-9bf3-4b7c-8257-e2157a060c35/46426713710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a65f52-119a-4427-85fb-f2c880c87f15/78870678367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662f7d77-d3fc-45fe-82c3-4dd6ead8de47/36144343094.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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 5040 bytes
SHA-256: 6493b858c5e9530c889b50911c55ac0157998e8e1c113af0ec84aaff54c9697a
font_01_sfnt_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 10932 bytes
SHA-256: 8e2e2d017f03fd1a6b0b04efe0a3d42acc9fee39f69896447c6040091b17cc76
font_02_sfnt_off00012cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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