Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0733b1802a4fb1a…

MALICIOUS

PDF

94.3 KB Created: 2020-11-16 23:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ceaf683a4b159032332cd0d42739c473 SHA-1: d60a0d02ba78943c809adc5cbadd4848d67ac806 SHA-256: a0733b1802a4fb1a2a26e3dfa887870341fcf3d55686cec6e907929f4915199d
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8278

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://traffnew.ru/123?utm_term=waldorf+school+of+garden+city+my+backpack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f9122352452c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8c0e0529016.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/c94c9596-4ebe-4c27-b459-12e512344206/37032109218.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/34057050292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb972e4-4e2e-464b-9529-33451c4305b2/34430111166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ad04f2-05f2-4a1b-9ade-a66fd0c9bbd4/bamini_ttf_font_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656b47ea-ee3f-42ca-beff-7f3791bc80fe/likikofax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f6eb9b-ae18-4677-bfe4-28a2b5b70b7b/james_anthony_welker.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000159d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x159D0 6504 bytes
SHA-256: 0b720450c5d4f5dc26dcb4bfcf1ca09c0f414f81811f4845182a31edefe8a295
font_00_sfnt_off0000cd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD12 7516 bytes
SHA-256: f94b7a9f9b44941a4729198749c0cbc3315ace3331c2b5ac0660dfc4562f3e09
font_01_sfnt_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 3220 bytes
SHA-256: dd45ea8efc1b633ccfd71ef01c3be96d0ac93c968fe6b74dac409e6759af20a4
font_02_sfnt_off0000ec32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 5888 bytes
SHA-256: 31aea3c7bee37ed35e88015665d5a1da7104b801c63e198f666bad790ca12b7f
font_03_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 6280 bytes
SHA-256: 2747466b0012945aafe0ad02a2c7c5c13d1e8884b8af0ce960b6ed9c3f1811fe
font_04_sfnt_off00010f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4C 16852 bytes
SHA-256: 4cc356dc95ef4217b96bcf3d26b5aab5b5c713613d99e38040393f865ca1229c
font_05_sfnt_off00014330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14330 16516 bytes
SHA-256: dcc04cc433837b3986e479babf093185dc6d099fad3e8bd8e79ac44911b58e95

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