Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bccc0d917914fa…

MALICIOUS

PDF

75.5 KB Created: 2021-03-03 01:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 509d600dd0127415893b3dff283c6cd3 SHA-1: 2b3adc76701de539a6aba0cada9c8f98f0723537 SHA-256: 01bccc0d917914fafacdff2eec079998014008f79c199ea6312e6bfbb4f82a5f
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with one URL pointing to 'dafemum.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. The document body, though heavily obfuscated, appears to be a lure related to diet information, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?utm_term=what+foods+can+you+eat+on+the+alkaline+diet
    • http://theplafond.xyz/discord_nitro_free_crackge5ob.pdf
    • https://cdn-cms.f-static.net/uploads/4475577/normal_5fe6231caf319.pdf
    • https://cdn.sqhk.co/pugepavofu/hjzjhhb/robot_crash_fight_mod_apk_revdl.pdf
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5fd03edc4e6a1.pdf
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fe00c2ab7d7a.pdf
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5fcb50824e77f.pdf
    • http://1gusevshop.space/captain_tsubasa_dream_team_apk_1._13xlbvx.pdf
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5fc874c3de1ff.pdf
    • https://static.s123-cdn-static.com/uploads/4501374/normal_5fc9a38e172d5.pdf
    • http://oneitstore.pro/who_wrote_the_monkees_theme_songzorbh.pdf
    • https://cdn-cms.f-static.net/uploads/4459029/normal_602156b25ecb9.pdf
    • http://fastcreditcheck.info/stand_by_me_sheet_music_guitarl38qa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/firigugixujotov/activate_windows_8._1_64_bit.pdf
    • https://s3.amazonaws.com/suximawo/47485105484.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/jasmine_flower_pics.pdf
    • https://s3.amazonaws.com/divexikav/lapaxoroge.pdf
    • https://s3.amazonaws.com/fulazelof/zetarudul.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bc.bin
473ead412e02af81b48b4f01dd08cb13964c0c11e87053b86be25e7202cfcbcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 5192 bytes
font_01_sfnt_off0000fb81.bin
eca6415a03874784599ac3cd260a516adb56a7fa396d8ed904fca995f9a212ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 10396 bytes

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