Malicious PDF — malware analysis report

Static analysis result for SHA-256 837946275f73cf21…

MALICIOUS

PDF

81.1 KB Created: 2021-02-25 10:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 773f24632d99412b5299539ab93d8855 SHA-1: 23441073d355822f62f0cc025f80c596085b223c SHA-256: 837946275f73cf21e24c26e7a8084c07d806852548d60dce47a5894038c5333b
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'maypoin.ru', which is likely used to host a phishing page or deliver a second-stage payload. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

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=magnetic+current+edward+leedskalnin+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/noluxokeruma/gWYgcPq/home_paint_ideas_exterior.pdfIn PDF document text
    • http://best-ital.fun/50505373785f0j09.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/brasart_320mg_bulafux1t.pdfIn PDF document text
    • http://zamuxodub.22web.org/96750894275.pdfIn PDF document text
    • http://profaudit32.ru/books_on_subconscious_mind6cir8.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/juzowilipi/kinetic_typography_template_free_after_effects.pdfIn PDF document text
    • http://fowagamop.rf.gd/74510676541.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/62782134894.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/car_logo_quiz_ppt_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/who_created_the_summoning_jutsu.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/firestore_android_kotlin.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/gewuvuzifedelotitalol.pdfIn PDF document text
    • http://vajonaz.epizy.com/btc_wallet_apkpure.pdfIn PDF document text
    • http://majuditatip.rf.gd/35516529636.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/bufibesififadamonopu.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/aoc_c24g1_24_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/dakazi.pdfIn PDF document text
    • http://rilijoxedu.rf.gd/kubadexitoxilon.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_off0000fb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB24 5612 bytes
SHA-256: 57bf523ef797a1a37a3829281c64c6d81665d698ec53fddc184494ee1c4dc3ea
font_01_sfnt_off00010e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 11780 bytes
SHA-256: e82594c62c504b62e40fe5c03328b539bcab987832051eab95a90c78989fdb96

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