Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb119c4d51cf3d7…

MALICIOUS

PDF

82.9 KB Created: 2021-03-20 20:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a18fdf758328d2691de246e5d9ad6f24 SHA-1: 8a0d87c4618ddfb93e66a4562ef87c604a2850bf SHA-256: 4eb119c4d51cf3d74b059821ca95568f019def97085548206d718d27d31c0ca0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URI points to a suspicious domain, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a phishing attack, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/award?keyword=toxinas+bordetella+pertussis+pdf PDF link annotation
    • http://towonededuv.medianewsonline.com/bulova_marine_star_98b301_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/ghy7bgI/vetasomex.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/31590359269.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/iegfgdf/76482835293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_604b333bf0072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fec95201c428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ff26b531e488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_6038678cf1f34.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/egcgjqR/alienware_laptop_17_r3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411231/normal_5ffc732ac3c41.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/egjiiNF/bomber_friends_java_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443325/normal_6007ea8c2d145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_6030d6d74e6e2.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/NsuHshf/kasikugim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_601fd916d3de2.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/metakibeme/el_contraataque_liberal.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/l298n_module_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/arcgis_software_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/shed_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/kilojirapemifetedo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 5192 bytes
SHA-256: 549a12e8d27f4fe8836f982bdf8e16efe4bde49263906fec788d1e02e0ec139a
font_01_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 12536 bytes
SHA-256: 41cc217f4595828a7c3b55b6e4368769ca85bbd3d0a34ea6dab3847e048e9a1f
font_02_sfnt_off000127c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C9 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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