Malicious PDF — malware analysis report

Static analysis result for SHA-256 1902f9b5e7c1696d…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 18:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a68136ba9902a701d5ec78478d1aecf SHA-1: 5c877839b8a5e4f468779a4cfcee61a9f9a7b96a SHA-256: 1902f9b5e7c1696dd108edc4e374cd9bcd697d71cf5a90207282290115382e12
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Weebly-hosted PDFs with numeric slugs, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as https://midufefew.ru/wix?keyword=digi+clock+widget+plus+1.27+apk, are designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://midufefew.ru/wix?keyword=digi+clock+widget+plus+1.27+apk
    • https://ridejotewofo.weebly.com/uploads/1/3/5/3/135314456/kutavakupek_juwexaveke_butisi_xafupuwedekos.pdf
    • http://kudretbozaci.com/latest_bukunmi_oluwashina_musicjlprb.pdf
    • https://nububoreral.weebly.com/uploads/1/3/4/4/134467099/dulefisulodorabu.pdf
    • http://cmb-societe.com/farragut_north_playsehlu.pdf
    • https://bifimazetaxa.weebly.com/uploads/1/3/5/3/135326975/tokutojine.pdf
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/2748396.pdf
    • https://cdn.sqhk.co/kadefowuvun/iaBdZKO/42580715421.pdf
    • https://cdn.sqhk.co/guzowozuk/nghidwT/24556114210.pdf
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/825007.pdf
    • http://fixmarker.fun/bathalagoda_rice_research_information1089o.pdf
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/xobuseroxewuk-xejezotupidono-bamewe-kosaka.pdf
    • http://idealica-itufficiale.website/i_am_who_god_says_i_am_sermonsbemy.pdf
    • http://bloomwithdeanna.com/70207765481fnfkw.pdf
    • http://erse.xyz/how_to_hook_up_a_digital_converter_box_and_antenna9a20a.pdf
    • http://lienforkid.com/27430891550a3bcl.pdf
    • https://cdn.sqhk.co/segexiji/iehIgie/best_buy_customer_service_pin.pdf
    • https://cdn.sqhk.co/sofawaju/dLge5hg/ronivi.pdf
    • https://cdn.sqhk.co/kinanekoxo/2Njjhhe/download_game_world_war_arena_mod_apkpure.pdf
    • http://kokusurajiguz.22web.org/84204323189.pdf
    • http://stonersfranchise.com/i-193_processing_timegstf1.pdf
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/zesavage-luzisox.pdf
    • http://prodit.space/the_dream_vrwp5cz.pdf
    • https://wawogikaso.weebly.com/uploads/1/3/4/7/134726687/wubif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zoxusanobidu.epizy.com/77706761919.pdf
    • http://kopixagelaje.rf.gd/kagirewubelopibebo.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_off0000ecd7.bin
3ccb12ba4edf2e8cd3aef7d6a93ad093a8c99f0ff161b97b300f249862fdb871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 5596 bytes
font_01_sfnt_off0001002e.bin
3976d1651e9b46c68035b7e203cfa429abecdacc8bb32307b63d0335660fdf7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 11152 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.