Malicious PDF — malware analysis report

Static analysis result for SHA-256 be164cf77c3495e4…

MALICIOUS

PDF

93.0 KB Created: 2021-03-29 12:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f814bd558adb50884f10722704d6427c SHA-1: 2c44bf7a4b082825f9e7fd51270632e96594c6a4 SHA-256: be164cf77c3495e45155f37fc5bd979f81c744d6cf164a045b39c0bcc24c1aec
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL and numerous other URLs suggest a phishing or malware distribution scheme, likely attempting to trick users into downloading further malicious content. The document body, though heavily corrupted, contains keywords related to a book download, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=fundamentals+of+hvacr+3rd+edition+pdf+free+download
    • https://cdn.sqhk.co/wubunepan/gflPjhh/fexepifo.pdf
    • https://cdn-cms.f-static.net/uploads/4375352/normal_603e94a4b3415.pdf
    • http://new-volosi.ru/vebetesupuwasemuvide7o4jg.pdf
    • https://cdn-cms.f-static.net/uploads/4464850/normal_602be763b8cf7.pdf
    • https://cdn-cms.f-static.net/uploads/4491451/normal_604ab3302122f.pdf
    • http://fabermanufacture.ru/duxilotijeria24nq.pdf
    • https://cdn-cms.f-static.net/uploads/4408471/normal_604941f81a77c.pdf
    • https://cdn.sqhk.co/nuvuvidova/eIcjb2T/zadugusatixajonidakezuvab.pdf
    • http://talakam.space/tup_admission_formpiwb0.pdf
    • http://front-glass.website/84122299670mzirz.pdf
    • http://sneakerspapa.store/13949748487qdcb1.pdf
    • https://cdn-cms.f-static.net/uploads/4403959/normal_604182f1a1570.pdf
    • https://static.s123-cdn-static.com/uploads/4381973/normal_5ff92d5b7489f.pdf
    • https://cdn-cms.f-static.net/uploads/4496812/normal_60217b163db05.pdf
    • http://kneeksi.ru/105094220008sfw6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_da2a698edeb4452c9fe8f9bba67b93df.pdf?index=true
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_604ac2572f5a470fbd4d2ceb54ee023e.pdf?index=true
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_c488806bac104f68a2d8ea63166c93cc.pdf?index=true
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_70223251b595487ea78ad341284d8d55.pdf?index=true
    • 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_off00011d48.bin
4dc58c2e40194c02edaf28b695d0a6bcb896b7005073383b85469672b094de43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D48 5548 bytes
font_01_sfnt_off00013008.bin
a05917d9ce3b6d021aa783694d01348490a7ebf2bbd17291dd30c62ce5ead374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13008 11692 bytes
font_02_sfnt_off000157e7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157E7 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.