Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f3ace6e1b00178…

MALICIOUS

PDF

87.0 KB Created: 2021-01-01 06:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b82ced19e849f5b59e5ee1a9137c586f SHA-1: d60bb14b9097eabb2b2c81c61e4256c53a9fd494 SHA-256: 19f3ace6e1b0017806e98a1dac30e909a15120250b41f4cd461a7a5f3998d443
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a phishing URL. ML classification and ClamAV also flagged the file as malicious. The embedded URL is likely intended to lure the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=kim+seon+ho+running+man In PDF document text
    • https://cdn.sqhk.co/tipefimex/7Hd4Vgf/artisan_sourdough_sandwich_bread_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/DDagejj/91199503836.pdfIn PDF document text
    • https://cdn.sqhk.co/dokijesu/HPgjidq/skins_us_cast_season_1.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/eqRAhf6/kuzedamamokikimawetev.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/ahagjja/mizezid.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/RjbOPig/boombana_national_park.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f91d3f573756.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/Wjachhf/99582360654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b823c07-d77f-44a8-abbd-700967f855d4/24692267813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70579094-aab7-400b-827f-8541c854cd36/boxopiwufuxided.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e913d7-1b82-48fd-8f6c-337b52af0d54/tunokomizad.pdfIn PDF document text
    • https://s3.amazonaws.com/dafalebinoza/rovituzetipokeniwoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c151313-1d5d-43b2-af22-45719cf0bc7d/zaxororu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 3312 bytes
SHA-256: 3d934ca35a20f16e261d72a36175b17971d3ba2f87adb02230efc0e22a05f6f0
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 5036 bytes
SHA-256: 5a923018acd0a32a125c7e869c76a136c317193db37144aca11a1327186e35eb
font_02_sfnt_off00011348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 10916 bytes
SHA-256: 8c93ab2984119f7dc98ca0a9863809b6d0dc05106e3f60d9f66ecdd9b3e19a5d
font_03_sfnt_off000138f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F6 16272 bytes
SHA-256: 7731d024c3187d2947a660081bce54e712c658838d11eee596b6fe186aa352d9

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