Malicious PDF — malware analysis report

Static analysis result for SHA-256 0995c4009bed3569…

MALICIOUS

PDF

78.6 KB Created: 2021-04-26 04:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 639225f01a00b58047d0f987d5de5295 SHA-1: 7fbfbc7367f918a0df7ba7cedc387ab9745708aa SHA-256: 0995c4009bed3569865f75ab21540ef5a6416c8084f9cb7cfcb71a36159e8e1d
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 'dafemum.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to an idiom, which is a common tactic for social engineering.

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://dafemum.ru/strik?utm_term=the+eye+of+the+beholder+idiom+meaning
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601011547f297.pdf
    • http://unreguezff.rest/brother_xl2600i_needle_sizee7lzm.pdf
    • http://getplafond.xyz/walaxuvudufatotisurezlduyu.pdf
    • http://nuveclovet.xyz/20671846874sgb8q.pdf
    • https://cdn-cms.f-static.net/uploads/4487206/normal_60328362c3ef5.pdf
    • http://kartaidatodemeleri.com/dimetiparodibanumenageljwhdd.pdf
    • https://cdn-cms.f-static.net/uploads/4366965/normal_6032dd5559f04.pdf
    • http://smartcreditus.info/best_platform_games_ios_2018xw4f6.pdf
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5fd06eb9ae952.pdf
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fcaa6e127863.pdf
    • https://cdn-cms.f-static.net/uploads/4483837/normal_606e7faf2e34f.pdf
    • http://mklhhhh.space/pamilenawiog6op.pdf
    • http://remeik.ru/alecto_coa-_26_manual01c54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vosimalume/madurowekunemogizoworu.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/ropomupegisunifujiza.pdf
    • https://s3.amazonaws.com/zexozavo/20126234736.pdf
    • https://s3.amazonaws.com/jotogorurekuro/45709505651.pdf
    • https://s3.amazonaws.com/jevedijadiki/tejuledarefi.pdf
    • https://s3.amazonaws.com/fowonaxul/14118111172.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e756.bin
4b7ca178821d3b2011c40b90b530c73bfebe2e73d9026861b672aa114ced09b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5124 bytes
font_01_sfnt_off0000f89f.bin
679f642eb4a4597fff3980be46ae29331af0b2c30b3f44dfdf1862c2653ca9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 11440 bytes
font_02_sfnt_off00011f3a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 4324 bytes

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