Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba7d6acefabec6f…

MALICIOUS

PDF

70.5 KB Created: 2021-02-26 08:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5e9494d020012861b4e3a9bc6c8987bb SHA-1: 1af31d64711b431aa94fefb58a5bba63d869adca SHA-256: 3ba7d6acefabec6f0ba3ed74310fa882293f6ef8e20d277dab54fc3b6d4ca8a3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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/wix?keyword=christian+voters+guide+2020+indiana PDF link annotation
    • https://cdn.sqhk.co/totafeta/ijjjx0v/22827248427.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/lisam.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/ibShhhb/cross_phone_wallpaper_download_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/6vS4akb/used_car_sales_manager_jobs_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/ohij7Qe/berivelisatetir.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/5155209.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/qIjijb5/star_wars_galaxy_s_edge_legacy_lightsabers.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/h4ha57y/lakers_swingman_jersey_wish.pdfIn PDF document text
    • http://tawokurabugo.22web.org/85972038139.pdfIn PDF document text
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/jekifetixa.pdfIn PDF document text
    • http://nuzadovokebin.iblogger.org/67693438185.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
    • http://vuzujalaj.epizy.com/seven_years_old_lyrics_lukas_graham.pdfIn PDF document text
    • http://xibubew.epizy.com/miwinigatuz.pdfIn PDF document text
    • http://zukusuvajijip.epizy.com/nedaledarugukujevavonesup.pdfIn PDF document text
    • http://wasaxotudulolo.epizy.com/54419721771.pdfIn PDF document text
    • http://fusifovizit.rf.gd/adobe_captivate_9_user_guide.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/prison_academia_free.pdfIn PDF document text
    • http://monuwuwotivonil.epizy.com/budget_tool_app_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_off0000c8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 5296 bytes
SHA-256: 2ecdda5ffe819e4517f67dc4d89bf32522934f8b43546c01349f1404e6690a65
font_01_sfnt_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 10584 bytes
SHA-256: ead57b5b79634e706253385c66e4d67901ad75dba3c3e51379591600152d6ed5
font_02_sfnt_off0000feb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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