Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d052a3f7d922e7…

MALICIOUS

PDF

96.2 KB Created: 2021-03-03 12:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1cd71c059955dbc5967ac81d54a76d7c SHA-1: dea23b3dc3c10fc0c775cc048a9fc4d2fa3f4130 SHA-256: 21d052a3f7d922e7c00913f9292ada5cc629445a0c9287e985b2e7e07b9a5f98
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'fokemale.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to reference a book title, suggesting a social engineering lure.

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://fokemale.ru/strik?utm_term=despertando+al+gigante+interior+epub PDF link annotation
    • https://cdn.sqhk.co/jaxubefe/eifheia/jolirosixigotowatizipugu.pdfIn PDF document text
    • http://tewavel.iblogger.org/gifowigajomomutikati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5ff655919bec5.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/dgezia3/98594484473.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hcdgdY9/titan_quest_immortal_throne_classes_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/Bgdkjhv/sezegosexubodevozabepov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_60205a7de67f0.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/qdZgdje/the_tribez_castlez_pc.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/fejakixoweka/bozivumutitawekokako.pdfIn PDF document text
    • http://gajovab.epizy.com/custom_rom_for_samsung_j200g.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/2407515384.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/25642087918.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/september_earth_wind_fire_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/dell_latitude_5480_laptop_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/avatar_animals_hd_images.pdfIn PDF document text
    • http://lapapagidufabo.rf.gd/68193893388.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/99358011766.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_off00013890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13890 5268 bytes
SHA-256: 018a4eca1d5895f47c6ae1f4a5ed23cdd8b5ae365c2f1b726528f628f3b0344f
font_01_sfnt_off00014a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A83 12200 bytes
SHA-256: add28b2464f60da4e1d6093c030b0c5b80b370784841f84f354abe7558e05c61

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