Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5ec9685ad053e4…

MALICIOUS

PDF

66.9 KB Created: 2020-12-31 14:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3d927a771af201d36ff9ca0e2e55ad9d SHA-1: 1c64e5571b4171d170aebbb4442718a0d4de4ddb SHA-256: 2a5ec9685ad053e4416a1193720d2e818a9ab41ec2f4906a2be7839a4a9a53fa
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

This PDF file contains multiple embedded links that point to known malicious redirector infrastructure and disposable hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

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 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://ggtraff.ru/123?utm_term=caron+simply+soft+party+yarn+silver+sparkle In PDF document text
    • https://tibefuwejar.weebly.com/uploads/1/3/4/3/134332688/0bf994a4b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f972bfe9bd13.pdfIn PDF document text
    • https://kepowawovexe.weebly.com/uploads/1/3/4/0/134016687/6063669.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/VCQaIXv/gesupisum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fd26e2e1b6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f9de4c1c9f67.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/polatepumedojesukisi.pdfIn PDF document text
    • https://nikibowo.weebly.com/uploads/1/3/4/3/134354591/9730341.pdfIn PDF document text
    • https://zolulosix.weebly.com/uploads/1/3/3/9/133986826/aa37bad132341.pdfIn PDF document text
    • https://sugemisikuwev.weebly.com/uploads/1/3/1/8/131856456/repuletijobazo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_5fcd389c6cfcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8b0e62426d1.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB82D 5084 bytes
SHA-256: 0162c664778079c283da4b585378a185ed87953ca3f2b083835da951f555f3f0
font_01_sfnt_off0000c96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96F 11068 bytes
SHA-256: e3ce7cbfb747549c62824c3a3661adf52eb4be7b57a18c5982e5f2d71d5bd86b
font_02_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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