Malicious PDF — malware analysis report

Static analysis result for SHA-256 69429918255a1de6…

MALICIOUS

PDF

71.1 KB Created: 2020-12-26 19:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ff8caf042427ace7408190f74965f14c SHA-1: 9c8374839b784d5e0bdc97ed1087d001f493b8e4 SHA-256: 69429918255a1de647487a2944c1373d3a1a31e588301404c943cc8270e33cd0
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains links to a known malicious redirector, specifically 'https://traffine.ru/strik?utm_term=child+growth+chart+girl+calculator', which is likely used to deliver a phishing lure or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'child growth chart girl calculator'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://traffine.ru/strik?utm_term=child+growth+chart+girl+calculator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_5fd7da8a11763.pdfIn PDF document text
    • https://cdn.sqhk.co/jilanukubok/KQgeibs/free_water_parks_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/ihjgdLW/godadenidakeromenup.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/MqVjeje/sweet_fruit_candy_download.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/kobivimelelo/mapimotasunujomaferapab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bea0250-8f74-4f62-a8d4-33f25402a608/fear_the_walking_dead_season_2_story.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/tamil_bible_history.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/best_android_phone_june_2019_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/bintulu_port_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14842edd-7ff5-41f5-9491-07633ee07965/fletching_boost_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5ca414-0f84-4d5f-bf9c-109dac909990/34428236277.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/jiguluvesuwudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6226a8bd-feb5-4683-b4f6-53af1bea3355/unit_6_worksheet_2_physics_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2483dd0-eea3-4e27-bfb1-24fbece64c2c/xupow.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC3 6476 bytes
SHA-256: 5c96381b2956ba85bdc606e02b4bc67750563a6a571ffb0d67253edb336a5a64
font_01_sfnt_off0000dac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 5020 bytes
SHA-256: 86346821b2946522984091d6fbdd5bfc2609e801e75d837b515a4691c426b766
font_02_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 10328 bytes
SHA-256: 8f76e61655525ebb209eab7a55d680233e1d4f5810fba0829ed4d3efeea88113