Malicious PDF — malware analysis report

Static analysis result for SHA-256 01562647a851895b…

MALICIOUS

PDF

82.9 KB Created: 2021-05-24 22:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2deb3ae559dde89409d1ce808ddff9ba SHA-1: 25200f8def95348292b05ec18fba61cefe4abac0 SHA-256: 01562647a851895b11b3cd6d0d4f1a7fd4f6843510b588f7386ed091bafeae50
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be a lure related to scientific terms, likely intended to disguise the malicious intent of directing the user to the external URL.

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://nipisod.ru/strik?utm_term=exothermic+and+endothermic+reactions+difference PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602bdf27425f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407804/normal_5fddf9a73c33b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_60581c8d3d72d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_60510ac123bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427076/normal_60401d572b7e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_605c95c2f3df9.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/dibedamoka/harry_potter_howler_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/pugixevavilixatajadiwilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3a6d86-e9cb-4de8-9755-6277c6453f6d/cost_to_replace_watch_band.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/how_does_the_beast_represent_fear_in_lord_of_the_flies.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/4542166680.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/bed_sheet_queen_size.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/31449714920.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/binder_cover_templates_word_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/25488452554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3eb1e0-e666-4d97-978a-7ef69f92ac7f/raxixabezufir.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/does_warrior_diet_work.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/lifoviz.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/16521043235.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/16911201345.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_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 5252 bytes
SHA-256: a4cfc1fc78f0c5443b2a219607682d687853d3451f6bfdd4128c5de67c93bd22
font_01_sfnt_off00011513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11513 11900 bytes
SHA-256: 0895f033cd1d44817116652877d7baf11aa290dfa384be545b9a8adf28da72b8

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