Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c25072ba7791b3…

MALICIOUS

PDF

74.5 KB Created: 2021-02-15 11:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 305e85f0605c8ef4d2ee7c9db4f87064 SHA-1: 264629125c7afb9773e4c4c0bb93e03adac37614 SHA-256: 61c25072ba7791b3356ac7a1e45c64a00ab29bc77632f37142deba27dbafb28e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely used to host phishing content or a secondary payload. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Mortal Kombat name generator', which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=mortal+kombat+name+generator PDF link annotation
    • http://dazakaguwaxe.22web.org/hypertension_guidelines_aha_2017.pdfIn PDF document text
    • http://fufexak.22web.org/93190319229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5ffb92afbaac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_6023e981b9638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366623/normal_5ff15b369dd88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_60101f833452d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389820/normal_6000033fb6929.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5ffd3b66d0073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_60003acf27fa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fef5252298cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464527/normal_5fdf6567b4321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roronusosewurul.epizy.com/nivikijev.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/install_android_python_module.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/zogigobibupotigavu.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/please_answer_question_in_spanish.pdfIn PDF document text
    • http://kokutefuto.epizy.com/how_to_rearrange_pages_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/87675895182.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/68269538729.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A8 5036 bytes
SHA-256: de3a3d9a3223ab8f51d85b34c811f9950156099895b5fa0be4838e1772f2cd60
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 10340 bytes
SHA-256: 85ad928f314fef6ec4e7378514d55468513e3ea9c31db94e6d0307916332b88d

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