Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fd61107008e523…

MALICIOUS

PDF

73.6 KB Created: 2021-05-28 12:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 26f63eb0db83d96ce96d25784876a0e1 SHA-1: d216b54cc141fa1fc7b56bd25c20a0bac9e7cbc3 SHA-256: d2fd61107008e523efa39ae98976840b886004eb9507555767eda5ed46aaf23a
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded URL that points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure, possibly related to a song ringtone, which is often used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=i%2527+m+a+mess+song+ringtone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_601e83a8e058c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_5fd15d7225e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_60331a0667058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_606c43327d7ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fd66758c89ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5ff4b97d61f6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471690/normal_5fdd105a7609b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405930/normal_5ffeaeff6b7fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_6009a1c4929e7.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/10e262e6-3374-462c-a7a9-7057416b2004/wamepelowikagebinepoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6927a1bc-c361-4313-b00f-4abd246983bb/kopanelukibitedaxodifagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3286b36-4e2e-47a0-85d9-c233c1bb3d95/joint_probability_of_2_independent_events.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb54612-1686-4906-ab82-783eba3f34a4/fenikute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8663e0c-b8de-4022-ae60-c293c1ad5796/21187617811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c237c2b-07f1-4057-9d00-5ccbb6f56c56/dagonopopipujibakapaxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07afebb7-54d4-4438-aaa8-376938a50113/como_saber_cuando_una_persona_te_miente_psicologia.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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 4944 bytes
SHA-256: 18d28885abb3993b0d2a0324f8ff29af3a16191ca1483b0ada5dd3f1678b99d4
font_01_sfnt_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 10884 bytes
SHA-256: 7498c109eb3d21ea821f649b7fe4b6e9d8707f1320078e16a3b12f3295e9af8d

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