Malicious PDF — malware analysis report

Static analysis result for SHA-256 0570c0e7d5c30cfc…

MALICIOUS

PDF

66.4 KB Created: 2020-12-18 23:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2b3107af1b5f81f7de806d375c58b4c8 SHA-1: 98798d1df74c48dddc629ed53c2771186e9f9a42 SHA-256: 0570c0e7d5c30cfc7b24d242adbeeea66a17eb2a17c3d56e4bf7d4271cb0e9da
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with critical heuristics indicating it functions as a malicious redirector and a link farm. Several URLs point to disposable hosting and known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute further malware or engage in phishing by luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/123?utm_term=que+es+un+cuento+de+hadas In PDF document text
    • https://liwufetut.weebly.com/uploads/1/3/4/5/134596667/nedozatubokasel.pdfIn PDF document text
    • https://dobaviwipiz.weebly.com/uploads/1/3/4/7/134766835/6a8aa9a160ae3.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/libugidilotul_dagorosizig.pdfIn PDF document text
    • https://rafulosuzeme.weebly.com/uploads/1/3/4/2/134234553/lugufogukepemetam.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/jeburugoxivuka-katuvudowofumo-wajep-rupejaximofite.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/nelizenejakarug/rofaxesota.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/calculating_performance_in_oee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79ff837-ce38-4633-b43f-e4517e16b054/mivime.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0b0c4f98375720a790c2/1606290189318/vudizogaru.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/grand_theft_auto_5_mobile_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381c27d6-9cb1-42eb-828e-12c668038522/zupaz.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_off0000c6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F4 4960 bytes
SHA-256: 863cb454bd2a6381c96bca5b56bfbd4cfe137edf5e6196eeedcaf47f47095e01
font_01_sfnt_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 10984 bytes
SHA-256: 932d7f77959f0bd4b5f7b6f9c440046e872f674c20ffd48a5e647d74b40631c3

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