Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a92c791d1693583…

MALICIOUS

PDF

61.5 KB Created: 2020-12-09 14:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 55a95a4e84abc2cd13bad9d3b74b7122 SHA-1: c4ad6426e06935188c5c8dffb8f2d0462164eee7 SHA-256: 3a92c791d1693583b538f2aee91e6444b05d542c6a64126b5f1d6aa631bf4afc
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'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely used to lure victims into downloading further malicious content or to phish for credentials. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=lenovo+t60+manual+download In PDF document text
    • https://ruzakemofa.weebly.com/uploads/1/3/4/7/134708924/gesokaxis.pdfIn PDF document text
    • https://suzabotofofetab.weebly.com/uploads/1/3/4/7/134739937/jizitibifu.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/53f62379cb6d.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/2890416.pdfIn PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/11289a9.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/746480fb-14f9-414d-af57-e8c8f1bf82e3/80956473439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bb7288-75dd-42ee-a293-3c855de7b338/70619463942.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/chicago_manual_of_style_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2b894c-61b0-4d02-8984-0d19df9ce351/kolalexidemoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287a1c73-e41c-484e-b28a-fb1ed564da85/spore_patch_5.1_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f08f2e5-a9d9-48a8-b819-64955c674ca0/axure_rp_8_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04178ee8-ad76-4435-87ae-b76210fb58fd/minecraft_team_extreme_launcher_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22729a32-a45f-4e8c-9e89-f113b5fc7409/sakomotawevabovoveliva.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_off0000b3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E1 5088 bytes
SHA-256: 91a7841c3da2ef0735dad1f48ca46755ff584a19576be464fc20d5f660962d3d
font_01_sfnt_off0000c52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52F 10612 bytes
SHA-256: cda75a305bf818273ba46e332b1fa5fe4029b68f9886f4a66e3ecb246b68981d

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