Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae88f1206bd6c1be…

MALICIOUS

PDF

67.7 KB Created: 2020-12-28 04:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b67afc516bf683acf0d5e02cba7e26 SHA-1: 115d9c6f6b3ec3596ab99554083890b9badf760a SHA-256: ae88f1206bd6c1becf01b42068297355db5f02823b24bc8aeadfdd24ea85385f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL and numerous other URLs point to suspicious domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Army wallpaper hd for mobile', which likely serves as a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=army+wallpaper+hd+for+mobile
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/421325.pdf
    • https://static.s123-cdn-static.com/uploads/4473056/normal_5fc67b15b9084.pdf
    • https://dubutabinagi.weebly.com/uploads/1/3/4/4/134441981/gawaxumuzuwenok-rilonezig.pdf
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/xaseb.pdf
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5fae55fe93422.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/firigugixujotov/17451125204.pdf
    • https://uploads.strikinglycdn.com/files/0bb96723-f42b-4d96-9ae9-a1f2f4758eae/13369950939.pdf
    • https://uploads.strikinglycdn.com/files/9f993eaa-e74d-4f8f-aacd-5d182bb89f15/49040296543.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bffd.bin
1820a416ca8394cfda272b98974ce9ed09ee10edd5919a9f4291023ff4430226		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFD 5028 bytes
font_01_sfnt_off0000d11a.bin
fa575b134a9c36d2735362848adcddc2edb84bc99055ae83f6ff0643e6491d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11A 10312 bytes
font_02_sfnt_off0000f46a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 4324 bytes

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