Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afcbfa1540d02f4…

MALICIOUS

PDF

82.1 KB Created: 2021-07-12 20:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 50ef768753233bfb1c6b8d4948d8bd08 SHA-1: 5f8d2870aa3d7a61eddebc6934c8d0d2d8f285b3 SHA-256: 9afcbfa1540d02f488edf87fdc10afba90e44eeb215a25fcbb0c5e5d1a11961d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as a phishing trojan, indicating malicious intent. The PDF contains multiple embedded URLs, some of which point to external resources. While the document body is heavily obfuscated and unreadable, the presence of external URIs and the ClamAV signature suggest the file is designed to lure users into malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3811

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://feedproxy.google.com/~r/sq/ugae/~3/qI_NY8u86tA/square?utm_term=chinese+brutalism+today PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93c1a025aa46e30d3b03a/1625898011028/gigizofosepugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec77077e2b6271615a2c53/1626109703473/business_policy_and_strategic_management.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94ef3c22c005c933a1666/1625902835412/luwuzeduzuvatifek.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 10900 bytes
SHA-256: d0e652475eab6efccbbb3ed62b00bc7b7c7c3a781a4e137280074fae20d638e9
font_01_sfnt_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 2552 bytes
SHA-256: b2092eee73ff1837486545c8ff82aac84c1cee1ca225f71951ad477885406c00
font_02_sfnt_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C41 18976 bytes
SHA-256: 75b53d4d0ded888198261bb0eb348eb920afdce31449217ad5a8a509e408b0e2

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