Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4252ec2f7e6c908…

MALICIOUS

PDF

75.3 KB Created: 2020-12-26 08:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7288cf7084e90a4a4210311e7b292aea SHA-1: 097faf76ce34407a1c920e69b06630d5f0d7db0c SHA-256: d4252ec2f7e6c908ce7c3a1210c6739705a25814b860327d8aa3f36573f71e6c
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. It impersonates Facebook to lure users into clicking a link that leads to a malicious redirector, likely for credential harvesting. The embedded URLs and the nature of the heuristics strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xitemexum.weebly.com/uploads/1/3/4/3/134311382/426f5.pdf.
  • 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=ralphs+pharmacy+edmond+urgent+care In PDF document text
    • https://xitemexum.weebly.com/uploads/1/3/4/3/134311382/426f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_5f969a0cd54c5.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/gRicosl/xisufumasuxaxefuwapasiwe.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/sodajibak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_5faaad9bdfd07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_5fbea7be1f87a.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://s3.amazonaws.com/nisiwanolom/baleta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8875280f-a20f-4ce2-8e14-320188fa09f9/96225245237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2962e0-b351-4d21-b1f5-9e23ffd79a81/18862348847.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/88471753371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a41ad5b-1940-43dd-be8c-0beb1c69ad24/88401656314.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/mamomurerinesutanunox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 5428 bytes
SHA-256: 2f4564c8822a28cf2f36b4fd95ffa9918bd11cc385453f1eb0eea83dbc877ea9
font_01_sfnt_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 10504 bytes
SHA-256: 2ffc959389d8fda2e8afe74b443f1226798cbf047094eada518c2cd96dcebd92
font_02_sfnt_off00011242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11242 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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