Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d20eae6f58fe76…

MALICIOUS

PDF

81.6 KB Created: 2020-11-18 01:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8c333aa3a5ab451241d4b3774be0fb5e SHA-1: 1ae4c822d4275f6004ebf0ba82cd4507908f7277 SHA-256: f8d20eae6f58fe76836588e144a57ec1f97c7e73cdb2292c14173ad4eaeee56e
214 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, appears to contain text related to game cheats, suggesting a lure to attract users to click the malicious link. The presence of numerous external PDF links further supports the 'PDF_SEO_LINK_FARM' heuristic, indicating a coordinated effort to drive traffic to potentially malicious sites.

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/123?utm_term=star+wars+battlefront+2+cheats+pc+mogelpower In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f99099704cdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5f9a19eb5d333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f89dd0d95b9e.pdfIn PDF document text
    • https://vudufidobisij.weebly.com/uploads/1/3/4/6/134673615/verel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f9ce3241bf78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5faa4df26d98a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f94894a3be8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fac212e0c840.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/7e9e9eb1-25fd-42c5-9772-ea035d4614ce/30793514553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47dee274-ae65-4f2a-b943-577fa7b81617/tamuwijopopewasabuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/sebuniniguvul.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/1986_troy_bilt_horse_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/avengers_age_of_ultron_tamil_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/utility_theory.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_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 5896 bytes
SHA-256: 6df33be8689b5c6ac6c8b788f7c05a70a60ce02f571b98a18f7c1160ec568a0e
font_01_sfnt_off00010cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC9 14116 bytes
SHA-256: 5503993e48e4972a0fcee90e0e874a704556eda09682895b81dd3177cad7f305

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