Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df620a612ff26ea…

MALICIOUS

PDF

62.9 KB Created: 2020-12-16 14:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b413a33103e3acee5e9597f4b919082a SHA-1: 96e00590dc4a51b726a3da17ae53047bd5186a57 SHA-256: 8df620a612ff26eaae0ebd22f3b142eb537c95ea80bd0bc09b09b607e13acdf9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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?utm_term=subject+verb+agreement+exercises+3rd+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5f9b0f7408eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5fad9b9715f2c.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/xakes-ruguroruzusoni-wesala-tepozozova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381964/normal_5fc8101147b48.pdfIn PDF document text
    • https://vefaruturibil.weebly.com/uploads/1/3/4/5/134525254/pugupagomapidoji.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/20f30af2-75e9-4413-90a8-160fbf147400/gafisexovuwufavopexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c523b6d-97fe-4f83-ba04-11de9405391d/sifadukijowasam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce57852a-29e4-4bb5-aa74-7b376064c0eb/12962564356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d1a47e-3408-46a9-a0c0-445044b76984/moonlight_slumber_little_dreamer_when_to_flip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903d78ec-879b-4d50-99ea-84457b96f3ff/femimowevonovegurogivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2006b54e-27e1-4e65-8b54-3f75a874a305/sota_magnetic_pulser_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/zebipitigowababoxepew.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_off0000b81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81E 5840 bytes
SHA-256: be5b0376daed2699342bdcd41d42eb7d6546b4e57453ee1906728f7a917f533d
font_01_sfnt_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 10224 bytes
SHA-256: bd72a33948028d14ce788c22d96188353b8548ad03e128043a7f1d7a4efaec6f

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