Malicious PDF — malware analysis report

Static analysis result for SHA-256 304f8633cd2db71e…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 12:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f64fff156a8219648a8b8562b02ab63f SHA-1: 206b7d93d7561ca5c2886bc0dfee2efc70fc849b SHA-256: 304f8633cd2db71ea9586545c93f2e345315cb31d2c531039ae579219423ebe6
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits malicious characteristics, including links to known malicious redirectors and a lure for remote support tools. The document body, though heavily obfuscated, suggests a theme related to 'steam gift card generator reddit', likely a phishing pretext. The presence of numerous links to disposable hosting and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • 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://yafferge.ru/wix?keyword=steam+gift+card+generator+reddit In PDF document text
    • http://expressday.online/guided_tours_national_gallery_singapore34ugi.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/the_hunger_games_mockingjay_part_1_soundtrack_download_zipeta4k.pdfIn PDF document text
    • http://merishwheelrecords.com/1393567757qt03.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/hTmCggw/wiruzewubunukoreki.pdfIn PDF document text
    • http://jokidinavefo.22web.org/nokitedu.pdfIn PDF document text
    • http://logmeinnow.xyz/43700615211dh15k.pdfIn PDF document text
    • http://agentsecure.space/62346132271zpsks.pdfIn PDF document text
    • http://bigwin-1xbet.fun/diablo_3_switch_multiplayer_split_screeno8y09.pdfIn PDF document text
    • http://storedubai.shop/79110501053pmj6p.pdfIn PDF document text
    • http://tokio-2020.fun/53943597364daq2d.pdfIn PDF document text
    • http://acupofjacob.com/how_to_change_pump_oil_on_generac_pressure_washery1e62.pdfIn PDF document text
    • http://dewobazul.22web.org/29463760757.pdfIn PDF document text
    • http://momentikshop.space/era_of_celestials_code_2019n4wp5.pdfIn PDF document text
    • http://copyright-securityx.com/come_disattivare_aggiornamenti_automatici_app_androidte13v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumazudu.rf.gd/14979666078.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/cambridge_igcse_chemistry_past_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/oecd_compliance_risk_management_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/woolworths_app_for_ipad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 5232 bytes
SHA-256: 79c3e365d58be1bae30c0e9a8bd45caa76a87b23127604afe4c64f6fbf0afaa9
font_01_sfnt_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 10604 bytes
SHA-256: a5a13f4878da5f92dc992e2f63d3c4876c9b41de9d93c8f4ebd12920292610c8

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