Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f90dcf24758e12…

MALICIOUS

PDF

81.7 KB Created: 2021-03-10 20:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b6493d74cc7424e4e216bb973494691d SHA-1: 521d292fce51da12a04d2bd946f386f211124c88 SHA-256: 01f90dcf24758e12134733de757e56cd3ecc95c5ea7894f96b332e94ca6c985e
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a link to a known malicious redirector, yafferge.ru. Furthermore, the document instructs the user to copy and paste content into a shell, which is a common lure for executing malicious commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/123?utm_term=react+native+android+build+release+apk In PDF document text
    • http://gosejoligezo.iblogger.org/how_to_setup_pioneer_touch_screen_radio_bluetooth.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/ejercicios_resueltos_de_movimiento_ondulatorio_fisica.pdfIn PDF document text
    • http://tinubawolu.mywebcommunity.org/27290366552.pdfIn PDF document text
    • http://demigatakubap.iblogger.org/2540779494.pdfIn PDF document text
    • http://paselon.getenjoyment.net/yamaha_yas_101_external_subwoofer.pdfIn PDF document text
    • http://zipimenegan.iblogger.org/263984899.pdfIn PDF document text
    • http://jiviruke.iblogger.org/how_long_is_surg_tech_c_school.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/what_does_2_timing_mean.pdfIn PDF document text
    • http://wetepuzasuvuroz.22web.org/1927157018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b27a4b-b652-407d-80e1-c649a7e93b46/whirlpool_water_softeners_at_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/bodyguard_salman_khan_photos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5c68aa-cd36-4478-9fdd-5ba063b68399/html_tags_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/jadesabifuzowewopugol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02bc2ba-2c44-4799-a687-6fbe993b4b02/when_should_a_child_be_potty_trained_overnight.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/obituary_template_free_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75c92d0-62ef-40a6-a131-82ac28dbe571/naxuxadujamavevonumew.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/goligulezajupavokizoku.pdfIn PDF document text
    • http://sudokutovomewin.rf.gd/nubojugaxi.pdfIn PDF document text
    • http://limirosu.rf.gd/sword_art_online_manga.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/arise_verb_past_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/8962699301.pdfIn PDF document text
    • http://lirurija.rf.gd/zefunugejasitoderufesuw.pdfIn PDF document text
    • http://wirodugapilab.epizy.com/citizen_marinaut_titanium_gn_4w_s_eco-drive.pdfIn PDF document text
    • http://ziriboxemo.epizy.com/10913854784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20b6c74-ca50-498b-9110-455c778e8767/estudio_del_trabajo_1_unidad_4_estudio_de_tiempos_con_cronometro.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/mivefoz.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_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 5340 bytes
SHA-256: 665aa1ebd6f02e3e5821cecb207726ffef5ba6653f50ea9a926954d9b7862cfb
font_01_sfnt_off000111e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E8 11520 bytes
SHA-256: 533a71f0152ec997dfd06afb055ba37931adc2ed28d7c4c81a2c09c0b922eb18

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