Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4258f40182bc646…

MALICIOUS

PDF

81.3 KB Created: 2021-04-03 21:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 87f2949477f52143d59a6612f81912c1 SHA-1: 05057094b4b0fa5afefe024a771fbf48894b6ff7 SHA-256: f4258f40182bc646a2f1f9a28e7f5216a164fdecabecb3a5860e0d6bf1713550
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, suggests a lure related to financial forms, specifically 'Brighthouse annuity systematic withdrawal form'. Multiple external URLs are embedded, with one directly linked to a suspicious domain ('fokemale.ru') and another using a redirector ('cdn.sqhk.co'), strongly suggesting the document's purpose is to redirect users to malicious sites. No scripts were extracted, but the presence of numerous links and the ML detection point to a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=brighthouse+annuity+systematic+withdrawal+form PDF link annotation
    • https://cdn.sqhk.co/tugirujozi/jb23Ugg/3d_font_free.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/pdf_file_format_advantages_and_disadvantages.pdfIn PDF document text
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/4328413.pdfIn PDF document text
    • http://pasetbs.xyz/the_current_financial_reporting_environmentm7r0a.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/99017937370.pdfIn PDF document text
    • http://matteset-spon.space/how_much_does_a_marketing_manager_make_in_nycsy3ft.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/dizum.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/50c7287f6769d3.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/aQODX5T/70022173411.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/fitavowekifivituxe.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/taxaroturito.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/SfYhbjl/anganwadi_form_2019.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/94a12.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/geieJon/zombump_zombie_endless_runner_games.pdfIn PDF document text
    • https://lunisaga.weebly.com/uploads/1/3/5/3/135302545/ffe063fbcb8d49.pdfIn PDF document text
    • http://intereriia.com/xukigaj70eu1.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/clases_de_canto_para_principiantes_mujeres.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wofaxil/s5_launch_date.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/math_4_trig_ratios_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/how_much_for_a_retractable_awning_installed.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/net_framework_4._6_2_developer_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/tupeg.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_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 5680 bytes
SHA-256: ab673a1812b536ff04061a5caebc0e41c0183588648aefbe0a97b4fb2c07c641
font_01_sfnt_off0001112c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112C 10800 bytes
SHA-256: e1bdee39be00a96c2d3807be6ec6a2a53597912cda9604219534a1c5880d4aba

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