Malicious PDF — malware analysis report

Static analysis result for SHA-256 82578af8057888cc…

MALICIOUS

PDF

74.7 KB Created: 2021-03-04 11:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5a995fe187661742a00315b704278ce6 SHA-1: afd659540517a2336f7d982c4484acee9e938fc1 SHA-256: 82578af8057888ccfbd89aa136004b9356ae7fdd7089551cd90e4a801dcf4339
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely for phishing purposes. The PDF structure and embedded content suggest an attempt to disguise malicious activity, possibly involving obfuscated JavaScript, although no specific script was directly extracted for analysis.

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://nipisod.ru/strik?utm_term=programming+2gig+flood+sensor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369504/normal_602d03dce45fc.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/QEgiPjh/35607991477.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/iiLzjac/xikiluxokureru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc9449075ad5.pdfIn PDF document text
    • http://cmb-eco.com/arabic_language_courseo3chi.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/R7uQxEB/nethack_blessed_scroll_enchant_armor.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/agfw8ig/glorious_eleven_football_manager_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/xOjedjd/cute_puppy_wallpaper_4k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420924/normal_5fceebbdd17e3.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/single_crochet_stitch_left_handed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_600ffbb94a36c.pdfIn PDF document text
    • http://magic-world.site/beimaan_piya_gana_video_inganncl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5ffaea0bdabea.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/jbXgcie/megan_thee_stallion_shooting_why.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd376ec6c655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5ff2c13b7414d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibizuladode.onlinewebshop.net/tefal_electric_pressure_cooker_troubleshooting.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5360 bytes
SHA-256: 1047c2d2a784450da6dff03ed47dba662cdc0467ddf9baaf123fece1e6675bb7
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10380 bytes
SHA-256: b1a42a7134b3bb788ad808f160bb4d081b58f0e0749dc050d6aa1f03cbd5d899

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