Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b39c58f3607fef7…

MALICIOUS

PDF

158.3 KB Created: 2021-02-25 17:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 89cacb8267a60b3770d4834e8f3f559e SHA-1: bcdf4c19abf71e18c4a256d26f87b79cfb5322d4 SHA-256: 0b39c58f3607fef725eca51dfb22c59d5e5bffd803ad984757c58a02807b95fd
104 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The presence of a 'download button' heuristic further supports the phishing lure. While no scripts were explicitly extracted, the PDF structure and external URI suggest an attempt to trick the user into downloading a malicious payload, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=control+systems+engineering+by+i+j+nagrath+and+m+gopal+pdf PDF link annotation
    • https://cdn.sqhk.co/xapawavuma/hhbhhje/easy_to_make_cupcake_recipes_from_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/jZAhhP9/atif_aslam_song_2020_new.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/gcphDhe/caponata_siciliana_reteta_originala.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hdhj1gj/93586141368.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/W16jhCd/pencil_cactus_propagation_in_water.pdfIn PDF document text
    • http://waxokuvinati.iblogger.org/infographic_design_template_psd.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/gdhbih8/ghost_rider_3_world_is_dead.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/sykzChi/guided_meditation_for_anxiety_and_panic.pdfIn PDF document text
    • http://xugejujivekivu.iblogger.org/auto_sync_via_dropbox_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivozusemu.atwebpages.com/5305649355.pdfIn PDF document text
    • http://famuruvif.epizy.com/46389156927.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_off00022b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B71 5680 bytes
SHA-256: e5ce79887933e27c79fbe81bd6f0a3f49d4deb16bf22caab6fe48b2830a85f8f
font_01_sfnt_off00023e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E9E 13252 bytes
SHA-256: 6d16f759dfd27d834caed61fbed1aef6fb8eca207eab4b9540ecc80bd7958856

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