Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13f42181b007646…

MALICIOUS

PDF

68.2 KB Created: 2021-02-10 20:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 15fe79df2573e696a87681f96bcf0790 SHA-1: f4b5dc6260a32b1df73a84d23cce39c630b8a20e SHA-256: d13f42181b0076461df3eb045a3e5b651179b8b2a7ca08df8ccedb6e0c412500
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 phishing or trojanized PDF. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware. The PDF structure itself is also flagged for duplicate object bodies, which can be used to obfuscate malicious content.

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://maypoin.ru/aws?utm_term=nuit+albinos+pdf PDF link annotation
    • http://lalat.space/kern_transferencia_de_calor_descargarkl7mu.pdfIn PDF document text
    • http://gaydating.world/lost_boy_piano_chords_sheet_music_freek3u9c.pdfIn PDF document text
    • http://zahlungsservice-ch.site/boiler_water_standardspsatc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5ff7b0d9dc867.pdfIn PDF document text
    • http://dukozodi.iblogger.org/top_movie_sites_malayalam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_5fd11eac14b8e.pdfIn PDF document text
    • http://tameenegypt.com/cnc_machine_cost_price7svmv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408463/normal_5ff42caf1a6ba.pdfIn PDF document text
    • http://creditinquiry.info/all_of_me_karaoke0wenq.pdfIn PDF document text
    • http://bagedejatobino.22web.org/7451928287.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/wuniku/anaerobic_fermentation.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/vofafuwebigileli.pdfIn PDF document text
    • http://mafevela.rf.gd/cantilever_slab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/65276022065.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/rasumurekuzowirelupunu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE09 5048 bytes
SHA-256: 299c180cb07f9e45d94f70574f3fb9cdd3edb7e3a06024da355c937f1e98d8f4
font_01_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 11012 bytes
SHA-256: cbeff4745d3bc8a0b061d9c90fe7288af8ccbf327e5bbe66059149a6068e9e1d