Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcda26005dca2006…

MALICIOUS

PDF

57.8 KB Created: 2020-11-26 08:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6038b10d6eefee2fa4b0c9697dc6f93b SHA-1: 183ed71a8af4b48ae60f40d5d7058fda166f1733 SHA-256: fcda26005dca2006d227b04997069d45a174cd07c138e236cc8132a857f35fd6
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with the primary one redirecting to a known malicious domain. The heuristic firings indicate that this PDF is designed as a redirector and part of a link farm, aiming to lead users to malicious infrastructure. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/strik?utm_term=ren+and+stimpy+full+episodes+vimeo In PDF document text
    • https://netopanuneju.weebly.com/uploads/1/3/4/4/134493403/2649274.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/24af9c601.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/cb116a766c60e0.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdfIn PDF document text
    • https://tapojofam.weebly.com/uploads/1/3/4/5/134518610/8eb2df7.pdfIn PDF document text
    • https://woliremokeg.weebly.com/uploads/1/3/4/3/134340334/xatuvupitexugim.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/sorapobuk/fiporiturizuzetisake.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/dexcom_g6_product_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6fae6a-c31f-49af-a397-3246551fff4c/59792929772.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/surgeon_simulator_game_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/true_refrigeration_service_manual.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_off0000a8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E1 5260 bytes
SHA-256: bf1c325bd1711740c949fa794c89b3045d0df156c0f51415f8cc5e222cf07800
font_01_sfnt_off0000bacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACD 9412 bytes
SHA-256: 18cf7e4cb484147582572fb07b11541bd465afc363e4fbc06a032511e2d90a72

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