Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3186f04c386f9a…

MALICIOUS

PDF

74.5 KB Created: 2021-03-27 20:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2144345f157dd97294fc6c1aee1f34f SHA-1: dc4121e13fcfeaa441d3553df3de0b99de6fbcec SHA-256: 9f3186f04c386f9ae32f3563f409d77dd91026e1d1c0801dba42d6586c5ffdc3
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to PDF viewing on an iPad, aligning with a phishing pretext.

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://dafemum.ru/123?utm_term=read+and+highlight+pdf+on+ipad
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fce3f44848f9.pdf
    • http://roxifij.22web.org/business_model_generation_alexander.pdf
    • https://cdn-cms.f-static.net/uploads/4487894/normal_604dd8f95861d.pdf
    • http://xepidenad.scienceontheweb.net/11664025848.pdf
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6044915317d7f.pdf
    • https://cdn-cms.f-static.net/uploads/4472488/normal_5fe93827eadf4.pdf
    • http://samotimijo.22web.org/kapoxugabikep.pdf
    • https://static.s123-cdn-static.com/uploads/4481676/normal_5fee28e1a522f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vatosolikijike/49796612113.pdf
    • http://vufagozujidivu.epizy.com/brennan_manning_the_ragamuffin_gospel.pdf
    • https://uploads.strikinglycdn.com/files/75de007b-7900-4c09-b800-70370b9347b6/cantrac_navy_training_courses.pdf
    • http://jibitolokadidus.rf.gd/navy_seal_buds_training_location.pdf
    • http://debowuvo.rf.gd/how_much_water_to_put_in_avent_steriliser.pdf
    • https://s3.amazonaws.com/jagux/apple_itunes_free_in_english.pdf
    • https://uploads.strikinglycdn.com/files/4ef5ef62-1924-4c5d-a108-8125e2dba1e6/posazezatuvixutifopanor.pdf
    • https://s3.amazonaws.com/mukutud/74700647685.pdf
    • http://xaninulutinofeg.rf.gd/buckingham__theorem.pdf
    • http://wufikemofumop.atwebpages.com/polopem.pdf
    • http://nazonuretowu.epizy.com/45446429587.pdf
    • https://uploads.strikinglycdn.com/files/0f6d0df3-af54-4643-bcb7-e7a740036156/40646999884.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_off0000e932.bin
9fa33a82b16899091f78491b0330a4d4f0c16a0f6e8a93da72a4347e676adc7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 5036 bytes
font_01_sfnt_off0000fa5f.bin
aa65de4c63c456b8761321780078425788bc4b5ecf5d83fb2d182a9fbed9dfa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 10120 bytes