Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1204384f810d3f5…

MALICIOUS

PDF

147.3 KB Created: 2021-03-18 08:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 60cdb2335f76bb75f4863b297a98ff29 SHA-1: c5956d06e1473450ff63eaba00c29aaa87c3e6f4 SHA-256: f1204384f810d3f50d3f36eded364a0e358a271c317ef5f04d5aa7bc592d54e6
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, dafemum.ru, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. Although no scripts were extracted, the presence of a malicious URL and the ClamAV detection suggest this document is designed to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=kenmore+coldspot+105+manual In PDF document text
    • https://cdn.sqhk.co/dagozuwemep/iaMeheI/undertale_battle_simulator_2_player.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/77053091677.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/fiex8ig/masters_barber_shop_staten_island.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/dutavaxilanugimizut.pdfIn PDF document text
    • http://topagut.iblogger.org/91089080030.pdfIn PDF document text
    • http://durebivov.iblogger.org/short_summary_of_ulysses_poem.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/37464155720.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/7QjdgiF/zevaribanubile.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/hfgfqjd/69865511903.pdfIn PDF document text
    • https://cdn.sqhk.co/mudebijutene/jgNbigz/military_drones_low_cost.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/didowugorokirug/15726940760.pdfIn PDF document text
    • http://jexititojule.rf.gd/building_specification_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/1949073214.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/coordinate_graphing_picture_worksheets_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/aho_girl_batch_bd.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/95575516605.pdfIn PDF document text
    • http://nepopenezum.rf.gd/17801531849.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/tasiwafajepovedoxos.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/gulizukiwixiluruvif.pdfIn PDF document text
    • http://pujumek.myartsonline.com/is_breath_of_snow_and_ashes.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/arduino_bluetooth_code_android.pdfIn PDF document text
    • http://tumezubix.epizy.com/werugixomulejulogin.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_off0001fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE60 5504 bytes
SHA-256: f0df39fb9477230f2975bc1c7121adc560f7bf9cfefe7a0434e0eed5eb136580
font_01_sfnt_off0002110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2110E 14868 bytes
SHA-256: 5dbcbab4ccc5da787e141c1a60b122d2204e571a13da69ad86fc3b07309e567f

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