Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ea684e7eed597f…

MALICIOUS

PDF

70.8 KB Created: 2020-12-20 12:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5e894abc1e0de3155bc2e760f63609 SHA-1: 53578493315ba3a5e7bea990d7dae5dcf613c58d SHA-256: c1ea684e7eed597fb08a9f0eb28539d191ca0685ba6fc3111e946a3280ea3e99
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL points to a phishing lure, likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=sony+nsg-mr1+remote+manual
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5fcc0262879b5.pdf
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f8fce4f5c1db.pdf
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fcc549c9e24f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nokiva/58474923181.pdf
    • https://uploads.strikinglycdn.com/files/2a7b374a-7f6b-4a38-89c8-603f6384a861/lugowuvorasizabefegati.pdf
    • https://uploads.strikinglycdn.com/files/915320b4-84c0-43d3-89c3-c3d6b5f2f220/meworumokoneleli.pdf
    • https://s3.amazonaws.com/pibajuwi/21145267516.pdf
    • https://s3.amazonaws.com/voropa/parenthood_episode_guide_season_1.pdf
    • https://uploads.strikinglycdn.com/files/4674b249-fddc-4016-b0d5-3394602db987/dafesamebuje.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000e3a7.bin
e18f959ce2ad159e8ab2c7df40c338fba62a51763e18101b4f331e3d1d0ad95c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE3A7 23304 bytes
font_00_sfnt_off0000ae11.bin
171e3b388ffea5126ac4c621e1281febf5202e51b4ec1ac963e32363fb144a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE11 5292 bytes
font_01_sfnt_off0000c00d.bin
0a59c8b150c7602db9ac5227484db7ac526ab7b264f305c0be32cd112f41b74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC00D 10384 bytes

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