Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a2019e372c680f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-05 00:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 658a08c2010879bc2e6d9468eb360ae0 SHA-1: 04e5d500e296ccc53a6a4371bf90fdf8464f1198 SHA-256: 39a2019e372c680f4030b873b7555ce2a218b23380ebd1f6fe4bcf3ee12d8953
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious URL, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://dafemum.ru/award?keyword=windows+sbs+2011+support+end+date In PDF document text
    • https://cdn.sqhk.co/gavezexu/iiMhd99/79116222674.pdfIn PDF document text
    • http://itgermany.net/east_horsehead_lake_fishing_report8dloi.pdfIn PDF document text
    • http://vizionsmc.net/34750920342of023.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/jeIdjhl/football_tournament_fixture_maker.pdfIn PDF document text
    • http://gachihyper.xyz/27401092266zo61t.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/iigcflT/origami_butterfly_ball.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/what_is_the_best_online_yoga_teacher_training.pdfIn PDF document text
    • http://msertis.xyz/arturia_microbrute_se_analog_synthesizer_redeo0ih.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/learn_chinese_characters_app_android.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/top_safety_rated_infant_car_seat_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/jIicnTB/ecommerce_logo_maker.pdfIn PDF document text
    • http://febuvirot.22web.org/example_of_abstract_examination_with_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/iomijhf/68005039985.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/sigotopa.pdfIn PDF document text
    • http://gimazazutakegi.iblogger.org/76444329402.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/ghhjfih/npr_one_vs_npr_news.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/gRia7nu/passport_photo_id_studio_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/iaR0pgf/87651785951.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/egjjbja/legend_archery_bow_case.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/fghMQhg/assassin_and_master_thief_full_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/hcjfiBV/juzilivojijovubobowowar.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/yhHhaWD/fiket.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famekuputoda.myartsonline.com/vunesojofen.pdfIn PDF document text
    • http://fatewazut.epizy.com/16023461315.pdfIn PDF document text
    • http://ganiwozipowure.epizy.com/los_juegos_del_hambre_precuela.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_off0000e849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 5492 bytes
SHA-256: 45fdba522a086295147a17fde16bf58207e2c2b9f6874aa93a305ab7e771edc0
font_01_sfnt_off0000fb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 10136 bytes
SHA-256: 429070eb057df2a129e1e1b96eff76ce69f863283d6baf5ff9b94f736297d119

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