Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79cc945bbe48b29…

MALICIOUS

PDF

76.5 KB Created: 2020-12-26 13:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c90237426bbc32df517508ca8675de91 SHA-1: 3d5c775efbfa0cfa3fc3c8d0dcbbc2b34df5fee5 SHA-256: e79cc945bbe48b294452262e95df906560282b003a381a5e19a1a5a4203d19d2
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest an attempt to redirect users to harmful sites.

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://traffking.ru/strik?utm_term=a+blind+legend+mod+apk In PDF document text
    • https://cdn.sqhk.co/doxinotilid/FieQygk/fake_call_from_forky_prank_call.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/3716551.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/35beb8d2-13d3-46bc-b036-bc29d5880df9/carpe_noctem_tattoo_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/pikege.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/fagutobabogerodavonigoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef207c40-bd9a-4484-bda0-a0103d6310fc/10133501270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975aeba6-1bab-4e31-b33c-785ca67a7f2a/des_moines_christian_school_enrollment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65508ad6-d88c-4466-8425-1ba516219b18/pufenurolirapalonine.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/new_homes_in_new_castle_county_delaware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132b1b3c-2288-4d68-bcf2-58e93d4ae57d/geographic_infographic_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa71aefe-68fe-4519-9ba8-a5475b72f35e/7644114791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb09868-3ca7-4b5d-83ec-96c344d55868/94167599835.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_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 5200 bytes
SHA-256: 5a487c6e45e75f1d9718fb34d2baeb46950cf7b04cc35ba0876cc8eaf1aa5494
font_01_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 13396 bytes
SHA-256: 167696efe66623c9adea4d6eb757d00db9df1d8a3da681ae93dcbac94f3bcdbc

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