Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b58fd265153345…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 02:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401df0ce69b70358bdf533ed227c94e8 SHA-1: bfea599e73aeae9405c18c9542e7055286ef86c9 SHA-256: 33b58fd265153345ebf1fc468d0e398c5ba11b6b9dd503fc9f542b962c69444f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a URL designed to trick users into downloading a malicious PDF disguised as a book. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URI is a primary indicator of the attack vector.

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://ponafet.ru/award?keyword=ravi+belagere+book+siddhartha+pdf+download
    • https://cdn-cms.f-static.net/uploads/4366947/normal_60361350b663f.pdf
    • http://jabewes.medianewsonline.com/gekas.pdf
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/bebabuma_pijomuvimufi_bexafamolasa_derutuko.pdf
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/gojefulede.pdf
    • http://siwivelijutore.medianewsonline.com/ibps_guide_computer_capsule.pdf
    • https://lepabamun.weebly.com/uploads/1/3/1/6/131636917/fepere.pdf
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/8630963.pdf
    • https://cdn-cms.f-static.net/uploads/4420449/normal_603d52cb1950c.pdf
    • https://lefagetali.weebly.com/uploads/1/3/2/3/132302894/fapemagipogodur.pdf
    • https://monotuwisax.weebly.com/uploads/1/3/4/5/134589760/xonodufegibages.pdf
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/kotomupi_vaxoki_luluxibi.pdf
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/puvanun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fajujiju/rilikigasirebekanejuveves.pdf
    • http://wijijatalil.epizy.com/sonufakevabebalesobane.pdf
    • http://puwavunetese.rf.gd/interpreting_graphs_worksheet_5th_grade.pdf
    • http://tiwatimab.atwebpages.com/vimixoxomovebatun.pdf
    • http://xufoziminep.onlinewebshop.net/metales_alcalinos_terreos.pdf
    • http://vezevuzu.epizy.com/free_printable_graduation_invitations_template.pdf
    • https://s3.amazonaws.com/dejazuvorira/letter_of_recommendation_template_free.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_off0000ecf1.bin
3977a05b475ade83b897a5140319bbf8ec63be9cf570e2a4482a2d9d75355c0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 5664 bytes
font_01_sfnt_off0001004c.bin
94f5a9491c9dc55d792c70a34173212bb6320dbfe8519c0229b1fa7ef03c4613
pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 24176 bytes