Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca65be0b8f0a239…

MALICIOUS

PDF

83.5 KB Created: 2021-03-03 07:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e2952e976a097be3d67c3212ac7585fe SHA-1: 2c252a7276eca83b4ded09dea36a11fefdf6ef96 SHA-256: aca65be0b8f0a239fc4d60a3a1cda6cf578110056a5d5ff859e28aec9d5d3c4b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF documents, suggesting a link farm or SEO poisoning attempt. The primary malicious URL, 'https://fokemale.ru/123?utm_term=is+switch+more+powerful+than+ps+vita', is likely used for phishing or to host further malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://fokemale.ru/123?utm_term=is+switch+more+powerful+than+ps+vita PDF link annotation
    • http://vashobereg.com/fdny_salary_guidew072h.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/imbalanced_nutrition_care_plan_for_elderly.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5fe14e811fd04.pdfIn PDF document text
    • http://forsage.pw/azamara_club_cruises_headquarters_phone_numberaoino.pdfIn PDF document text
    • http://folejaf.mypressonline.com/49824613.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/30847968500fo2s0.pdfIn PDF document text
    • http://luxshop21.site/in_the_rooms_attendance_confirmation70lqb.pdfIn PDF document text
    • https://latuguno.weebly.com/uploads/1/3/1/6/131606113/nazozakirowerak_latoxazaleda_lajekorefowaku.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/meade_lx90_autostar_manual.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_to_light_rheem_tankless_water_heater.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/dobesogum/minor_attaining_majority_form_reliance_mutual_fund.pdfIn PDF document text
    • http://zijedan.atwebpages.com/obdlink_lx_wont_pair.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/astrophysics_in_a_nutshell_solutions_manual_2e.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/sweet_beulah_land_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/7964697797.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/witcher_timeline_books_vs_games.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/56829988644.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_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 5344 bytes
SHA-256: 9845d3afdc1e032b9892c7ac0b1c4e27907328caa695a528225265078396038b
font_01_sfnt_off00011abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABB 11108 bytes
SHA-256: 7442c89fe9a75ca04573091f5fd95e92090b3a290b7a4e2835825330e3d74e5f

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