Malicious PDF — malware analysis report

Static analysis result for SHA-256 164e5b522540d65a…

MALICIOUS

PDF

153.0 KB Created: 2021-03-25 17:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61a6e9490af1b200599d7f6048622b8f SHA-1: 2b09ac3bf118c1f06e45588ee12143068ae0d1d4 SHA-256: 164e5b522540d65a042c5dd62792a6ce03e114cfad0f03976e9dd28c58a4489d
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'dafemum.ru' suggests a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack involving password-protected archives, commonly used to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/award?keyword=biblia+de+jerusalen+nuevo+testamento+pdf
    • https://cdn-cms.f-static.net/uploads/4368742/normal_6029434d531ca.pdf
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/buvupoke.pdf
    • https://nijoriduzi.weebly.com/uploads/1/3/2/3/132302782/perodusob.pdf
    • https://cdn-cms.f-static.net/uploads/4455179/normal_603e8b3c50c05.pdf
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5feb962b6beb6.pdf
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5ff798e80cd0d.pdf
    • https://static.s123-cdn-static.com/uploads/4414866/normal_5fe1f723d5690.pdf
    • https://lijogidatu.weebly.com/uploads/1/3/2/3/132303170/joxav_zujowuzijopi.pdf
    • http://matulovipat.22web.org/danoxedowaxi.pdf
    • https://gemiletux.weebly.com/uploads/1/3/2/6/132681217/tugizi.pdf
    • https://lafitezin.weebly.com/uploads/1/3/5/3/135323108/sawotofi.pdf
    • https://cdn-cms.f-static.net/uploads/4446275/normal_60228649d9067.pdf
    • https://jibuzuku.weebly.com/uploads/1/3/0/7/130739289/b9c223f1ffd6.pdf
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/japumuvefotavu_zekomuwuruj.pdf
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5ffb06c722117.pdf
    • https://cdn-cms.f-static.net/uploads/4369645/normal_60262057472a3.pdf
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5fcae50569494.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_3a5284089ce2443992bde9a8ed7de7fa.pdf?index=true
    • http://bedowapuwusagin.epizy.com/sotikejitowufeliger.pdf
    • http://gezixerigalejeb.rf.gd/fotanus.pdf
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_2e33076cdd38457a84f4a3147f04ba6c.pdf?index=true
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_2eff6d2fac3144f9876fbf6ddc3c4e5d.pdf?index=true
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_513972a1467244b39bd76bda87e92dc9.pdf?index=true
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_822af0098b41405f84331f869f340cd0.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_off00020b3c.bin
ee2d90d28feabbf9cce3348125b981f2a610eb3d30a71c58b6df63fee1940f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20B3C 5396 bytes
font_01_sfnt_off00021d74.bin
08a02b5f1cc516ad3b25cd5fcd67a65fe9664b25fe01f85de1a56ba92e6256f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21D74 12420 bytes
font_02_sfnt_off000245c8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245C8 4324 bytes

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