Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df88b214fab6749…

MALICIOUS

PDF

117.5 KB Created: 2020-11-11 13:31:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2656820fe106c7d46974999eb0d073db SHA-1: 19227de0cdf3f70a92ebe0fa187a7f793f5a4ef4 SHA-256: 1df88b214fab6749ab59db6be781699e06d53bbb806b8c1191708820a825e9bf
214 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a link farm used for malicious purposes. The presence of embedded URLs and the ClamAV detection further support a malicious classification, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?keyword=poop+clicker+unblocked+games+66 In PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/dololeru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5fabaf0b8da92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8741263fd9e.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
    • https://uploads.strikinglycdn.com/files/bc16ce14-c35b-4ee7-8204-30d834c60256/kuxokisubi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/2017_audi_q5_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83002f7a-253e-4dcb-94e8-3d17b5ac86b0/21619220562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3e5ebf-5e93-407d-afc6-6661c7f51229/2000_nissan_xterra_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac9cbb9-b30d-4e1f-ad2b-d88f3fffb56a/32982280186.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/ridgeland_ms_conference_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c24593-0100-4813-8fdf-756774afc59b/mathtype_in_google_slides.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/79942008391.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 26104 bytes
SHA-256: 31736db4d0934482694c73f5cba57081d51cf3e5e2612a2d024e8e36d74fa53f
font_01_sfnt_off00016a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5A 5556 bytes
SHA-256: 2ce11fea59ba3b4c197e464017ac207718b80c1e64878263cd1f466c676b325e
font_02_sfnt_off00017cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CFD 5360 bytes
SHA-256: cb8f92dda965bf3bdade5d591e664e787dfd1609deb35e4c3ea9b960c2af95eb
font_03_sfnt_off00019049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19049 12192 bytes
SHA-256: 06c2b4065b9a81640dc3107d6ed63297bac42035c2bc3e909d02fe174381e78c
font_04_sfnt_off0001b9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9DA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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