Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19379fa00506cfb…

MALICIOUS

PDF

77.3 KB Created: 2021-04-04 19:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 227f36bac5bca8962d3719afed72c6a2 SHA-1: b3c98d24ea527c229da068d5a83de37a1c70899f SHA-256: b19379fa00506cfb51dff625846533a9c7d839986fd7a46f1c91d9c2334b5faa
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to host a phishing page or further malware. The document body, though heavily obfuscated, suggests a lure related to a 'Trex 500 dfc manual'. No scripts were extracted, but the presence of embedded URLs and the nature of the detection suggest a phishing or credential harvesting attempt.

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://kuzutuzo.ru/aws?utm_term=trex+500+dfc+manual PDF link annotation
    • https://cdn.sqhk.co/funixatugesi/ihGknji/9606306539.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/rdihcX6/gepidokibotetojuvapab.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/cgijiv0/one_piece_monkey_d_luffy_age.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/jjiniKe/siberian_husky_puppies_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_601f83010bf69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_6040a101381ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_602c139173b2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477183/normal_60679f76920d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_6016cd5acff33.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/L49heEO/how_did_the_hundred_years_war_affect_religion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/godewumazek/the_hound_of_the_baskervilles_summary_chapter_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3787d38-1f7d-4e1d-90ea-2b565ae5c45c/botuzotuwuwotafumexosi.pdfIn PDF document text
    • http://vulebodifoguvar.epizy.com/practical_auditing_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f15def-e0c5-4450-9712-67d0cf7e1424/rimanoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae56825-15f5-41aa-b744-65e255a95e5a/71015995861.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/posalikufuw.pdfIn PDF document text
    • http://jipinasin.epizy.com/16154275622.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 4916 bytes
SHA-256: f87bc89bdd8e51697a9a0bce24069dc7c588794c5569822edd389eec0c2da2f6
font_01_sfnt_off0000f5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F4 10420 bytes
SHA-256: 7457715e85dcc667d8ceceda3da481b8cbd24e04d77d63c5ced07ad51671532e
font_02_sfnt_off000119b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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