Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5608ef879e836c9…

MALICIOUS

PDF

75.3 KB Created: 2021-02-17 21:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 13f0acc4aa5f0beaa26ca8e6a6bd797d SHA-1: 9636bae98cb7060ee644f0e92d3171bb84c95b43 SHA-256: f5608ef879e836c99aeea7f444152ffc5f348899b79a4a582355fa6a789c665b
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 a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to interview advice, suggesting a social engineering tactic.

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://bologen.ru/123?utm_term=can+you+tell+me+alittle+about+yourself+interview+answer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467005/normal_5ff80c8f128f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_60213f2adeddc.pdfIn PDF document text
    • http://womotov.22web.org/36743239171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457311/normal_5ff92fdd6bca0.pdfIn PDF document text
    • https://cdn.sqhk.co/xilasexiki/yhhahbU/emergency_tax_online_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/Ujhf1Jg/durotujujuti.pdfIn PDF document text
    • http://majijeniwadimu.22web.org/bahubali_hd_songs_tamil_free.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/ehduieT/jinizugi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dabatisew/ironman_fletching_guide_osrs.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/preeclampsia_cenetec.pdfIn PDF document text
    • http://botemexake.rf.gd/82775250695.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/woxumazukoxogaloloda.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/38366863288.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/79738183017.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/goxololowuxunavedodufu.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/define_cloud_based_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/us_jacket_size_guide.pdfIn PDF document text
    • http://wekidezeze.epizy.com/91190216497.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_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5212 bytes
SHA-256: fd165a7e0cef8a19e85ddfdc64771f82e7d4fe97113f15e3dd5953d779a57578
font_01_sfnt_off0000fc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC00 10332 bytes
SHA-256: 3a589873be86a6f071abeb1a09261f31927d60fa5e0e591bfbd396ff81a69768

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