Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ba7ea445996c79…

MALICIOUS

PDF

65.1 KB Created: 2020-11-14 06:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 832af4e4a9cc29e49067866788b664e0 SHA-1: e9cb83b11ca76ef2b1504640541a61850c01f39e SHA-256: 16ba7ea445996c7922b36858c86ab4588afbe56539ce03cd8f18ece6374112a9
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. The document body, though heavily corrupted, contains text related to 'Lexington county sheriff reports', likely a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=lexington+county+sheriff+reports In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f8d36fb06f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_5f9ec33391b31.pdfIn PDF document text
    • https://lurefeti.weebly.com/uploads/1/3/4/6/134683691/zemosaji-gejawoxov-libitisu-zazerewor.pdfIn PDF document text
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/6c626bd9a5ece9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5f95a09e0bc52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f899d57b4559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5f8f630585788.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/4633727e-63ec-4e8f-bea7-4a44c28fb321/activity_guide_-_bytes_and_file_size.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/kudul.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/wopagasev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d541f70-0e0f-4e89-b984-ed0bf789a820/hyundai_key_fob_tricks.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_off0000c2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A2 5144 bytes
SHA-256: 27e06c69b5a1fd0c555438f732a726476ec3e4a17874bf9043718fa27f181a09
font_01_sfnt_off0000d442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 10340 bytes
SHA-256: c46dcba641c841b4332044bc6daeba8e1f2bf4d0208036cc431f12662c14e7c2

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