Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23753546e444b2b…

MALICIOUS

PDF

84.6 KB Created: 2021-02-06 09:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 76cd0993c64796420f2f57b3b07ff8fe SHA-1: 7e57345ad50ce9c8b77dae37cdf569526f2dbebc SHA-256: b23753546e444b2bcf023574e8a4fb94aeab458650bef8cd7a8a12bc7e445da8
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, which is likely used to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a company profile, aligning with phishing tactics.

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://jottigo.ru/aws?utm_term=axa+company+profile+pdf PDF link annotation
    • http://lngcliente.com/keto_diet_plan_australiaa882g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5ff7af840581b.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/jevAeih/38888317449.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/iSm1heH/dinosaure_new_best_hd_4k_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/WjcJgfd/printable_superhero_coloring_pages_for_kindergarten.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453563/normal_5fc6b19f193e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5fc901d5447ba.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/yvjduhd/43562413931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383165/normal_5fc7cda61e08a.pdfIn PDF document text
    • http://wugafis.66ghz.com/master_plan_template_ppt.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/jiguwuzobozobaz/117101203.pdfIn PDF document text
    • http://sajetubaj.epizy.com/28909546924.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/77618348604.pdfIn PDF document text
    • http://xunevonobi.epizy.com/53774032428.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/faziloxamagamefaji.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/dolch_sight_words_assessment_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/lixanatubuloletefiredimat.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/27685798819.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_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 5284 bytes
SHA-256: b361e8ffd091223f7c649b258b3ac8f80e1019d30010a8027a30980448198275
font_01_sfnt_off00011ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA4 12720 bytes
SHA-256: 1e15d01cc645458619424d86edcd39388156621f91f9127a0fe9ddfcde79f209

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