Malicious PDF — malware analysis report

Static analysis result for SHA-256 f909fa36570b2c0e…

MALICIOUS

PDF

68.7 KB Created: 2020-11-14 17:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cc24a502f508a625c08573698500d18c SHA-1: dc65f2a1b9ee7ab19f19b610469e6861777f825d SHA-256: f909fa36570b2c0ea1be451cc1baf50d07f31ad4aa5c0c0fcd2cfb11cfb7cad6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/strik?utm_term=cinderella+and+the+four+knights+ep+1 In PDF document text
    • https://datevapo.weebly.com/uploads/1/3/4/3/134338939/5165730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f9fe7536dcd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409096/normal_5f962b6a4a9cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5fa94e7e1ed60.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/6470581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fa19c56e1e5a.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/batoragubukepo/pevipofugamepazorugoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f305c365-b535-4be4-a9dc-fc6a28fcb919/jezebubovexanewapeligaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/o_holy_night_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/jiwuxuzirenomuworapulogat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a28103-a3a3-4570-8704-37b71446beef/nezali.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/abilene_warrant_list.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_off0000c5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AA 5324 bytes
SHA-256: f00d04faf68fbf7c69cb0d67cceee517fecf1ef254e5d6aec3abdf191d605028
font_01_sfnt_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 4284 bytes
SHA-256: 13a4c3882f05e816c4fa58a288011a5a22b8954dc926510551c739476dcf863e
font_02_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 10296 bytes
SHA-256: a3f62991d6a014406ffede9c2fa487410f50b4a2f6ac9093c2f078af16513926

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