Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e04857a0d608d04…

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 00:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8860f06ec09c4a7682c4ead167eecfc0 SHA-1: aa782a5359bb60666d6f7a704983e36a71496cbc SHA-256: 9e04857a0d608d044e2448959ee82794f1442d8fa1db52ffcf0455195d6fb6e5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being marked as benign, suggests a potential phishing or malicious content delivery attempt. No scripts were extracted, limiting the analysis of direct execution vectors. The PDF structure itself contains unusual elements, including duplicate object bodies, which could be indicative of obfuscation or exploitation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4086

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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=good+for+naught PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8781fa40056e74d2ad2b/1626113921493/ripping_small_pieces_on_table_saw.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91bc0aa30721e65eee5f6/1625889728141/4082185078.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86332ac72af35c7fc41c2/1625842482578/how_to_set_a_picture_as_slide_background_in_powerpoint.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
stream_005_off00012c57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C57 20216 bytes
SHA-256: 655a94122710479480c26a32708be98505c2b3074cad03126bb6257083919f21
font_00_sfnt_off0000cd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 18312 bytes
SHA-256: d27957b4d4abfe76d1cfe9973ee97cfab3a37cae7dfc17bf1af04a247b332289
font_02_sfnt_off00011551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11551 10332 bytes
SHA-256: 00183af62662b3537137ec5761685c4e86f6758b728a572c94b8b11cf150aa47

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