Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfa454d17bcb5e5…

MALICIOUS

PDF

69.5 KB Created: 2021-01-16 15:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b763d258065f42cacbf2ba3a5da5b853 SHA-1: 7465c8a7b898c1433001b94fe6e6cc8ce10ffcb4 SHA-256: 7bfa454d17bcb5e5e105bcce2b9a7f947e7457ed31d446fe4ed8b828d9cd2777
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The document body, though truncated, suggests a lure related to popular software, aligning with phishing or malware distribution tactics. The presence of numerous links on disposable hosting further supports a malicious intent to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/aws?utm_term=bluetooth+free++for+windows+10+pc In PDF document text
    • https://site-1173463.mozfiles.com/files/1173463/best_action_movies_hollywood_2018_download.pdfIn PDF document text
    • https://site-1174676.mozfiles.com/files/1174676/35074166947.pdfIn PDF document text
    • https://site-1174473.mozfiles.com/files/1174473/66117536947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5f96b76363ea9.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/Xpgd7qG/us_president_debate_2020_uk_time.pdfIn PDF document text
    • https://site-1172701.mozfiles.com/files/1172701/18612652379.pdfIn PDF document text
    • https://site-1218703.mozfiles.com/files/1218703/35204324215.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/dLpdigE/gundam_space_colony_drop.pdfIn PDF document text
    • https://cdn.sqhk.co/guregame/haShGji/modern_sniper_hack_mod_apk_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/mufelolepe.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_off0000d3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D7 5368 bytes
SHA-256: 118318ba00d0ab8f4990860dbc59a296f9ab58b5957796d9fedc9342381740a6
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 10316 bytes
SHA-256: 882f0ea4492eb5e8dc3096099a055068bc7a74e895697c8021457ccb1156573f

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