Malicious PDF — malware analysis report

Static analysis result for SHA-256 1128a05b7ffbcce3…

MALICIOUS

PDF

67.4 KB Created: 2021-02-06 10:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e191017f491c6cdc34f8cf845451432f SHA-1: dbf7fb57629d0711aba609fe66c0af53c776ab33 SHA-256: 1128a05b7ffbcce38bb4b9eef3873921a6b505d3adcb6f31fe006653c8bead8f
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL, disguised as a label template, likely serves as a lure for users to click, potentially leading to phishing or the download of further malicious content. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=avery%20address%20label%20template%20l7160 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5fd644c28deb6.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Lgiltji/vegan_spinach_artichoke_dip_instant_pot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5feafa1897e0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_600171e21da86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_6013c69f21b3c.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/jicwjal/ecology_recycling_fontana_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/yjfggSN/startup_costs_for_a_business.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_6003792d5e0d5.pdfIn PDF document text
    • http://poboxabirukus.iblogger.org/cover_letter_for_teaching_job_fresher.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455376/normal_5ffead18e07dc.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/napejaxosinages/aparichit_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/94036293399.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/a._l._p_admit_card.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/34143071368.pdfIn PDF document text
    • http://voduvurikijo.rf.gd/75828408954.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/37917096770.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_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 5824 bytes
SHA-256: e1696ffc1377f599cb7dd903e066ad2c59276eb2fd77ea37c597f36912ef440a
font_01_sfnt_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 10348 bytes
SHA-256: 7b9095bd3caf82e1bebe75dd69b9b0afd3024509a0971d3062563abe2d90e5f7

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