Malicious PDF — malware analysis report

Static analysis result for SHA-256 9246e2044f27f114…

MALICIOUS

PDF

67.3 KB Created: 2020-12-26 22:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1d9627ac7db329768c7dc425105cebfe SHA-1: e82ebea93197958ed4355a2db311d0da22a82d8a SHA-256: 9246e2044f27f1147a288f4dfc6779b36c7321f24951ff816b18b11403a7b56f
214 Risk Score

Malware Insights

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

The PDF contains embedded links and a heuristic firing indicates it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'cooking fever hack 2020', suggesting a phishing or scam lure. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

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=cooking+fever+hack+2020 In PDF document text
    • https://biwilodumiz.weebly.com/uploads/1/3/4/3/134319983/3833551.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/8d57ffcf38845c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486035/normal_5fc2d4c592c2b.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/fuwulol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5fb54e55da338.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/pasawexawinogad/thrive_architect_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0c6697-fb0d-4966-ad3b-2e4def86fa9f/wufuwirinijaduwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9073739-f1ca-45ab-b62f-227a746ac666/fugoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec82c1e0-7132-4c98-9790-39880689193a/damaris_rivera_instagram_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0e0c8a-7f91-41db-8192-0e4b9925d8b0/sexenaxolug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd220ae9-7ce8-4b73-9331-cba5f8112f28/jutotereforo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99feeff8-83b3-4dd4-b98a-b33b00d20b42/80915856419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb50cbd-fed3-4f4c-92c3-efab953a7b18/47193081210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17242f7d-103d-471b-b028-8e56c5fd23ed/chrome_save_session_incognito.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_off0000cb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB18 5236 bytes
SHA-256: 70001ad98e5826e60d35a366893baeb07a808870cb3c7c2dc16c235daa4bb06e
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 10560 bytes
SHA-256: bcd2a253b46c9f4a0c2aee378cdb11df0d68d8454181de6620d96f4c5a1e3bc8

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