Malicious PDF — malware analysis report

Static analysis result for SHA-256 7420458f7b9df016…

MALICIOUS

PDF

82.9 KB Created: 2021-02-23 21:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: afeab6cd13d1044ce6ee13bf8c6b861c SHA-1: c419bb8dd220a41e6e57082b8f9cf54274d37ba4 SHA-256: 7420458f7b9df016df30fb8127d6b10aec5c50c03ad8b533f4c94e8003229b02
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the ML classification strongly indicate a malicious intent to redirect users to harmful content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=craftsman+rear+tine+tiller+for+sale PDF link annotation
    • https://cdn.sqhk.co/bapisolel/fV4ZPhb/sniper_games_free_download_for_pc.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/mezamizjbhu.pdfIn PDF document text
    • http://kokogasuwesoge.22web.org/desupelunupesig.pdfIn PDF document text
    • http://fixmarker.fun/the_hunger_games_download_filmyzilla9xjyw.pdfIn PDF document text
    • http://bnl-jobs.com/farmer_sim_2018_hack_version_downloadpxcg6.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/hxlMifG/red_warbler_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/ejdJify/social_media_manager_salary_per_hour_uk.pdfIn PDF document text
    • http://ndfnasg.xyz/jamajukrmsuq.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/jfidKLv/ritukusenisonob.pdfIn PDF document text
    • http://baffer-shop.space/online_contest_rules_and_regulations_templateu4pi5.pdfIn PDF document text
    • http://neuroncraft.online/28269834462md7i.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/ijjjbgd/how_to_redeem_globe_rewards_kfc.pdfIn PDF document text
    • http://gatorama.site/new_headway_beginner_audiopzvo4.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/jazuravazaguz/lizagirajovowitomifu.pdfIn PDF document text
    • http://gubuker.epizy.com/saxowilijerifaxivitefitot.pdfIn PDF document text
    • http://kebowikosu.epizy.com/application_for_bonafide_certificate_for_scholarship_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/laxujadasuwefevovotab.pdfIn PDF document text
    • http://nawatelobuj.rf.gd/70016337614.pdfIn PDF document text
    • http://tudefoka.epizy.com/graphing_linear_inequalities_worksheet_algebra_simplified_2015_answer_key.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_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 4816 bytes
SHA-256: 259bbe465d4367b0cf2e2f83db877df88d31d7f0fd71900aaa70e4bf958e782e
font_01_sfnt_off00011bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB3 10232 bytes
SHA-256: 21bd7a90ae8bee228860d830d2a71fb6e75dbdc338bb6843ae87bd467af3030d

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