Malicious PDF — malware analysis report

Static analysis result for SHA-256 7088a184c968aae6…

MALICIOUS

PDF

71.2 KB Created: 2021-03-20 02:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa4593d931458a4f951f1f0ae5c4e16 SHA-1: 2a7951ce47b422cc626706c9bccf8f26ae8c4a5c SHA-256: 7088a184c968aae6abb5097b494ff438ed7ce7f5d6cacdf62c6d84a2b0f2096b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains multiple embedded URLs, one of which is directly related to a search query for a free book download, suggesting a social engineering lure. The presence of a 'download button' heuristic further supports the attack pattern of tricking users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=amulet+book+2+pdf+free+download
    • http://italystore.pro/red_alert_2_free_download6tptd.pdf
    • http://hisgohar.site/47160681315xn7sq.pdf
    • http://reduslimitaly-ufficiale.website/lagedojibivegaxevhvnb8.pdf
    • http://vezdesami.ru/zavirijulesejurv6jv3.pdf
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5fecf0934b2b6.pdf
    • https://cdn-cms.f-static.net/uploads/4484993/normal_605536e4055b7.pdf
    • http://rujitexoxobag.mypressonline.com/womapuponizavegawuxob.pdf
    • http://gufutaca6.xyz/fezenofagufexuginizuxxnvwr.pdf
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fe0076c2815a.pdf
    • http://gagefiwirimat.medianewsonline.com/vezewakuvapaxotimu.pdf
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5fd2d30d731dd.pdf
    • http://dkmz3.club/capacity_utilization_in_manufacturing_industryfrb7m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_aa25190a76b54a22b071b019a2efa407.pdf?index=true
    • https://s3.amazonaws.com/fovezewi/86392225695.pdf
    • https://s3.amazonaws.com/bewibiwat/fisemivulujokibun.pdf
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_28fc11ca8c6242a4973519d03544116f.pdf?index=true
    • https://s3.amazonaws.com/tozaduliwubega/6773043454.pdf
    • http://satogitexuvo.myartsonline.com/ukulele_bar_chords.pdf
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_e33aa896bab5426799976353ed12a7d7.pdf?index=true
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_606f9f29332f45ad98a2fea8065d374e.pdf?index=true
    • https://s3.amazonaws.com/zafibimutadoti/muguka.pdf
    • https://s3.amazonaws.com/lazolu/dalafotogupaxozoramelos.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_off0000d618.bin
5d5e235acead83a565f5ba81ab1ab1c9bdadb84be90fe377eac52ffd0bd90f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 5424 bytes
font_01_sfnt_off0000e885.bin
bc800120d5f673844ab7f5fb7a2020651aa6ca003d3e660c2151c7f510017dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 10744 bytes

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