Malicious PDF — malware analysis report

Static analysis result for SHA-256 78528660c219d8ab…

MALICIOUS

PDF

82.4 KB Created: 2021-02-18 13:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5598618e28109ab90f6eabcc930a5c3b SHA-1: 4b186a48c3ad2bf001e3cce42e39f5c9fbbd739a SHA-256: 78528660c219d8abcaee8865b564ab73f881416a275b2dd941c8bd0b8c3903e4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and the presence of a URL like jottigo.ru suggests a phishing or malware distribution attempt. ClamAV also detected this as a phishing trojan.

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
  • 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.
  • 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://jottigo.ru/strik?utm_term=malibu+low+voltage+landscape+lighting+troubleshooting PDF link annotation
    • https://torobekaxiwe.weebly.com/uploads/1/3/1/3/131380482/gepagemusegot.pdfIn PDF document text
    • http://24goodstore.site/osrs_barrows_guide_high_level6dnko.pdfIn PDF document text
    • http://wusazododapir.iblogger.org/recirculating_aquaculture_systems_timmons.pdfIn PDF document text
    • http://naturaleone.space/download_game_football_master_2020_mod_apk_offlinekq753.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/naverisusebizuv.pdfIn PDF document text
    • http://potenciy.xyz/update_android_galaxy_s6_edge301wj.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/dozupuxetomafukoxow.pdfIn PDF document text
    • https://suluxeposinugu.weebly.com/uploads/1/3/4/6/134634013/jorezijixo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/wwe_smackdown_live_blog_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/solipixasovetugu.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/sociology_book_for_physiotherapy.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/nigaderopokagumile.pdfIn PDF document text
    • http://kasanuvuwa.epizy.com/reflected_in_credit_report.pdfIn PDF document text
    • http://wurunuj.epizy.com/90481647726.pdfIn PDF document text
    • http://gaxodisesi.rf.gd/62739373499.pdfIn PDF document text
    • http://lajofekozorofa.rf.gd/5494556047.pdfIn PDF document text
    • http://tereralubo.epizy.com/lagu_abnormalize_psycho_pass.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/blacksmith_game_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 5512 bytes
SHA-256: 0df19374029499ce6282a33cd5ee30eb3ba3583aebf7ca3937e37290e0c75eba
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 10816 bytes
SHA-256: b7bac360da62c59b3faacce7aa34df4aba1da8ec9686d7dfac79d7ee372fde19
font_02_sfnt_off00012d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D34 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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