Malicious PDF — malware analysis report

Static analysis result for SHA-256 085af65180cb02bb…

MALICIOUS

PDF

72.0 KB Created: 2020-12-03 03:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0493835deffd5002dd1e5329eacf1524 SHA-1: 7fd7e5d2fb6e2659e399dfaa02256f78001de923 SHA-256: 085af65180cb02bb2845e6e968735eaee05f093e8cc00c415e54e615c0f47fba
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a high number of embedded links pointing to external resources, some of which are known redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO manipulation. No scripts were extracted, but the presence of numerous links suggests a potential for redirecting users to malicious websites or downloading further payloads.

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://gettraff.ru/aws?utm_term=black+abs+plastic+sheet+hobby+lobby In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f95f310265b7.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/164082fef46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fbc94315422b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fac253179640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f9b2fc406167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_5fba1c5ea2348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8c812a88279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5f98cde3f158d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f9b21e99e6d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417986/normal_5f9a478f27ecb.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/1a8cf90c-c7b6-4723-9f28-590bc6921df4/zesewazisazitajoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4b6cd4-fbed-416e-843d-a210946d9a02/65142979870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df924f13-a1d9-428e-b348-89f2fab0028a/biome_bundle_1.12.2.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_off0000dc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 5280 bytes
SHA-256: 251eea7237a2cb113f777a3e720a54068faa351a39cf1e31a17d21e896c9c494
font_01_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 10772 bytes
SHA-256: c13c1a8e645c773e8016e3b31153f27cc7cdaf13535f71587c5be0bce78188cb

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