Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afcf26bd36e2da9…

MALICIOUS

PDF

72.6 KB Created: 2021-02-15 12:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fba2ee6b65bbb8b4c330d4b9c1d667ac SHA-1: 09a65e46bde1beb9751bc2743b376745b6fe1c2b SHA-256: 7afcf26bd36e2da9d6a8918e3e5e05335b31b5cb59e22d8482a25ad16d4fdc4d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL, https://druttle.ru/123?utm_term=asrock+z97+extreme6, is the primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=asrock+z97+extreme6 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383170/normal_60021770bb3a3.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/VIzjboO/skyblock_roblox_new_update.pdfIn PDF document text
    • https://cdn.sqhk.co/tinukomafiro/Fjeiahh/warepegokugilo.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/HjhdUPK/stacky_wacky_burger_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/i91hbgi/21776505131.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/hyB2WFO/tigajawurasosateje.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/hc4CIdY/bubaxotadewejalu.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/jahg8xz/37774803417.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/ygdgegi/love_letters_for_girlfriend_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/jsgiPhh/74873359821.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/hfjirhb/love_photo_keypad_lock_screen_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/gxihJDH/92406314433.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/iasyNie/monument_valley_2_level_8_aphelion.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/zamuriza/81574567322.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/13502078348.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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 5264 bytes
SHA-256: c77d5ecdd8ae1023cb61a7cba7760009544341d435bb21aa2c3a8440b0ca460d
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 10040 bytes
SHA-256: f602e5e0d2d267f85f1b0b3548bfb190035c68d9e7c2850bfadfec38e7c997ec