Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa36396ebbbea3f…

MALICIOUS

PDF

82.6 KB Created: 2021-03-18 05:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19cd0a31e605fce1d3583184340cbdcc SHA-1: df08ac0361ffe8a72fcc4cb8ba3e4ce6aba09145 SHA-256: 4fa36396ebbbea3f0c34d4c9c14d951f95d053f147affd25c59ff095d9d4b758
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 of which point to disposable hosting and are used in a link farm strategy. The document body, though heavily obfuscated, contains references to 'bombsquad mod apk unlimited tickets', suggesting a lure for potentially unwanted or malicious software.

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 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://botokaw.ru/123?utm_term=bombsquad+mod+apk+unlimited+tickets
    • http://misujupino.getenjoyment.net/action_research_for_b._ed.pdf
    • http://bizifemodefi.mygamesonline.org/agenda_2020_english.pdf
    • http://gofimowekes.66ghz.com/7788226547.pdf
    • http://pokinusuvato.getenjoyment.net/9034924904.pdf
    • http://gapagal.mywebcommunity.org/38181512264.pdf
    • http://numidib.22web.org/acog_guidelines_diabetes_in_pregnancy.pdf
    • http://kejoxemubogese.mywebcommunity.org/cnc_machine_tools.pdf
    • http://folivapizi.66ghz.com/mifepetovobogifage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bixozebaxikapos.atwebpages.com/all_body_systems.pdf
    • http://buzanuziti.myartsonline.com/como_terminar_um_relacionamento_com_um_narcisista.pdf
    • http://tudafaketewud.rf.gd/70588972231.pdf
    • http://tinejamuwaki.epizy.com/37665276085.pdf
    • http://vobatize.epizy.com/goldman_cardiac_risk_index.pdf
    • http://resuzebapaluga.rf.gd/introduction_to_agricultural_economics_sixth_edition.pdf
    • https://uploads.strikinglycdn.com/files/0920fb30-3374-4bff-90b1-17cdb0266ec8/dajivorogigowanale.pdf
    • https://s3.amazonaws.com/kozibowisenatu/bilayer_formation_mechanism.pdf
    • http://tudexobus.rf.gd/30905994439.pdf
    • https://s3.amazonaws.com/kikunojulejuj/fitonabogo.pdf
    • https://s3.amazonaws.com/lopadivupudexa/anime_wallpaper_4k_for_android.pdf
    • https://uploads.strikinglycdn.com/files/bf5469b0-e82e-4a0c-9e4f-ac84abdb07cc/94120821040.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_off00010117.bin
0c3cbf1035c6fa5d7fd7f028918386f19cd752a8ec2766f82cb402f344f841ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 5504 bytes
font_01_sfnt_off000113b5.bin
a9d7f62ce0298ac12c6482a9ac3e3870cb691e39e5346b81f06a44377de12788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B5 12992 bytes

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