Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad893618025f2266…

MALICIOUS

PDF

110.3 KB Created: 2021-03-27 16:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5d13d0eb5f5f3ba1e523c205e97e9b9f SHA-1: ca02410eba354bf2ed3dc0784e2fa10992e15ed7 SHA-256: ad893618025f22663cbfde171fff952e7d3c242fef14da898e3282d473d2c576
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous external URIs that likely lead to malicious content or phishing sites. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9123

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
  • 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.
  • 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
  • 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/strik?utm_term=fz2000+zoom+test PDF link annotation
    • http://cardioactiveufficiale.site/8429577528zeve0.pdfIn PDF document text
    • https://xonoxiti.weebly.com/uploads/1/3/4/6/134679971/ravariwawalalum.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/n7jhu1C/green_bean_casserole_recipe_with_fresh_green_beans.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/5722258.pdfIn PDF document text
    • http://myfavoritesun.xyz/how_to_use_the_keurig_elite_brewing_systemhhsft.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/hhFgcs7/61520909143.pdfIn PDF document text
    • http://bojidodug.iblogger.org/mazatubofowubinututo.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/RWshc4X/zemodot.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/KhfxicQ/orange_tree_golf_club_membership.pdfIn PDF document text
    • https://vijisazegogufob.weebly.com/uploads/1/3/1/3/131380966/146e0bf39a21.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/bYyB83d/19134583860.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/rzK4gca/my_lottery_dream_home_episode_guide.pdfIn PDF document text
    • http://podeves.xyz/amadeus_peter_shaffertcsrw.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/X32jg3s/jiomeet_pro_login.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://janofegiwene.epizy.com/84664233909.pdfIn PDF document text
    • https://334e481f-4595-4613-8514-cf1b68b0f675.filesusr.com/ugd/a5bb32_3a6a79ed663f4a6b9f02877df515172d.pdf?index=trueIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_1078791f242644e7bfbe8054de425a46.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_e191f79eab21441c9a3e0b4ec2ef6e74.pdf?index=trueIn PDF document text
    • http://jodamedorofile.epizy.com/versi_android_11._0.pdfIn 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_off00018be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BE5 3116 bytes
SHA-256: d4a37935206b414a153f5f3bd7c49d920bb8f61750b16bcca6e134f88544adc0
font_01_sfnt_off000196e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196E7 4772 bytes
SHA-256: 9b198f262fe1f360382b7595073caeccff4d718ddd34ca25c7170991bacf7448

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