Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb3cde7323a2f9e…

MALICIOUS

PDF

73.1 KB Created: 2021-02-23 22:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f906ef6be61df6f512136da788196fdc SHA-1: 4505a2d0f7dda45264e391cbffe7234114444b89 SHA-256: 9cb3cde7323a2f9e7e7b5a7aa24a0f0348a1bbfbf2e0ec31dbd75e7909cf324a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=apk+btd+5 PDF link annotation
    • https://cdn.sqhk.co/bonosexov/maihgej/55030263554.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/hhOhdf4/21677610978.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/dunejifojusor.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/lnMtFjj/23489615966.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/AQifZhb/a2zapk_eon_music_player.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/c40PZ1b/58918539108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_603519ebdbea0.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/Djb08B8/fall_of_the_roman_empire_movie_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_6021107abbe80.pdfIn PDF document text
    • https://rubebukani.weebly.com/uploads/1/3/0/7/130740450/bcc532e1152.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5fc6645fab889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_601ccd48df827.pdfIn PDF document text
    • https://cdn.sqhk.co/felegabiw/Qifetij/bouncy_ball_games_frisk_ball_adventure_gamecube.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/jjRhaHg/darkness_and_flame_4_walkthrough_part_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_60084f4860cac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipijiz.epizy.com/24557858495.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_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 4752 bytes
SHA-256: 98354d7c062a6d7f3a95fb8eef2e821f9291f4102e4a3b5ecfba0a3eb92b402b
font_01_sfnt_off0000f4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 10216 bytes
SHA-256: bf766e018e436f6996045ca578e5d8c57d13379acf711415187af345a00c1faa