Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c3bc6c9519ed55…

MALICIOUS

PDF

73.7 KB Created: 2021-03-12 05:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d70a8c2c585556a07d682fd55d882817 SHA-1: e51ca80db12719d7e858c742de2c51c07f44c0be SHA-256: b8c3bc6c9519ed55d4e03ee94f76c898829699aa726ff52a441bc94aeb4a507f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and the ML classifier strongly flagged it as malicious. The document body, though heavily obfuscated, suggests a lure related to 'astm a182 pdf' to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs indicates an attempt to download further malicious content.

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
  • 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://ponafet.ru/award?keyword=astm+a182+pdf
    • http://freds.space/68931924441xzogk.pdf
    • https://cdn.sqhk.co/revowemerem/haibkxR/space_hd_live_wallpaper_apk_download.pdf
    • https://cdn.sqhk.co/jutafegobexe/hdjcsbh/smash_the_glass.pdf
    • https://cdn.sqhk.co/vavewiren/jbShcjW/60301684648.pdf
    • https://cdn.sqhk.co/gubisagebuto/vShiifd/5056313939.pdf
    • https://cdn.sqhk.co/noviraxat/jghGhhv/sutebipowuradiwudet.pdf
    • https://cdn.sqhk.co/noneniwetav/imT0lTl/mindustry_github_wiki.pdf
    • https://cdn.sqhk.co/nojedevatas/jmihig0/wolf_photo_editor.pdf
    • http://blognews.top/depunifufozaxefogapatavapwqgx.pdf
    • http://pusaburuku.22web.org/epson_perfection_v550_photo_color_scanner_review.pdf
    • http://cabinetshq.xyz/51214232105z9djx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nareboveridur.epizy.com/jimewogas.pdf
    • https://s3.amazonaws.com/zifozujiwi/infinix_note_9_play_price_in_bangladesh.pdf
    • http://vaxutusurinav.epizy.com/japaforelepun.pdf
    • https://s3.amazonaws.com/zifilobesumafi/income_guidelines_for_wic_in_florida.pdf
    • https://s3.amazonaws.com/taguxif/mugizuguvomasuwu.pdf
    • http://zokitidekav.epizy.com/hoss_intropia_size_guide.pdf
    • https://s3.amazonaws.com/taguxif/logitech_harmony_ultimate_one_battery_replacement.pdf
    • http://mefinuxewo.epizy.com/vowuwi.pdf
    • https://s3.amazonaws.com/pibajuwi/80444623639.pdf
    • https://s3.amazonaws.com/serogajugomiji/haidt_righteous_mind.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/devudutenavinulotoben.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e45f.bin
df2bdd68b71ad4f5613ec527dcd6f13ff974cb11c2ca21d8dc959290a23be5bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 5424 bytes
font_01_sfnt_off0000f6cb.bin
e1a1dd7246bc776d0bceda5e7ac1a90cb51bb47e92d9434e51b8ecdb33206bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 10320 bytes