Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b4ee289009e361…

MALICIOUS

PDF

121.4 KB Created: 2021-03-01 16:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c477cdd0e016f5cfc45f3a2c4cca38d5 SHA-1: 191557304a6e692c5a874b8a920c2303caaf6a76 SHA-256: 33b4ee289009e361f1d6e965903903f0553d8465081d062841b2f84e370e5bc7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though partially corrupted, suggests a lure related to free accounting books.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=libros+de+contabilidad+de+costos+pdf+gratis+bolivia PDF link annotation
    • http://gemubanabugawa.mypressonline.com/79747934673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_6005fd1b80eda.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/70361610785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404984/normal_5fc6bdf6ac716.pdfIn PDF document text
    • http://chebsvet.ru/word_academic_calendar_template_2019-_208j82t.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/how_much_do_ib_examiners_earn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6017a2baf35e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379045/normal_5fcbc2f7af0f7.pdfIn PDF document text
    • http://tujidal.mypressonline.com/reloading_pressure_signs.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/setaradavuvexixedasexu.pdfIn PDF document text
    • http://remastacer.com/mijenemazenuzafojafusejrmda.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/is_per_capita_income_gross_or_net.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492286/normal_5ffc00eb7b850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_6004936e792e3.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/15954869161.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namepafubi.atwebpages.com/schwinn_bicycle_pump_parts.pdfIn PDF document text
    • http://xegutosedon.rf.gd/49491638999.pdfIn PDF document text
    • http://ladorum.epizy.com/what_is_agile_model.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/how_to_draw_a_black_tree_without_leaves.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_off00018550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18550 6884 bytes
SHA-256: 754423847ba2da6ed91a43c29da1da0c3b17617c84de8aab8b22d112f27ac3f4
font_01_sfnt_off000198cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198CC 5464 bytes
SHA-256: dac8958374aaaa9de1e4863244c0f51b59ed532620ee615b0406b4ba64da4bff
font_02_sfnt_off0001ab76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB76 13044 bytes
SHA-256: 5db540b2482f4b7e5c6e59c1156f2cf185cec773e928984c99ad5f9ffdf973de

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