Malicious PDF — malware analysis report

Static analysis result for SHA-256 df997d4375ea2bf3…

MALICIOUS

PDF

73.4 KB Created: 2021-02-27 09:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c6f3f9f512799df17cb30cf89a87ffbb SHA-1: 002fb77ea275b3f6df0d54524ff376f6856bf9e8 SHA-256: df997d4375ea2bf386e7f6ba18153f1c9d7c3c3223bcb350d51fb3e8c3148691
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to a 'scarlet ibis questions worksheet'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=scarlet+ibis+questions+worksheet PDF link annotation
    • http://rowowevu.mypressonline.com/what_is_the_best_portable_cd_player_on_the_market.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/dcjgohq/monkey_run_game_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379842/normal_5ff54e008c517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454280/normal_5fec92f731fb4.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/asus_dsl-ac68u_wifi_modem_router_-_ac1900_dual-band.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/jam_transit_bluetooth_headphones_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5fcc7227650e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezafafowajij.epizy.com/banuweresejokujuxevesux.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/rekanudi.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/pop_warner_scholar_forms.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/what_does_vault_keys_do_in_monster_legends.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/gradle_version_for_android_project.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/1934098344.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/sikifomipugegomebaga.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_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 5412 bytes
SHA-256: 52b7b5df28019ed01c7a776b5d95dd7252c0a396f19cd73a45a43118929dc02a
font_01_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 10580 bytes
SHA-256: 699cefc70737d3ad5c6ad843a7afe8fd776c5cbeed613d06ff3c64ed07d7d70b

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