Malicious PDF — malware analysis report

Static analysis result for SHA-256 040a7ff3161f48f4…

MALICIOUS

PDF

73.9 KB Created: 2021-02-13 18:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4afc91d36c68ecaf630dd1ce61d4cc08 SHA-1: 0352ef8ebd407050f268527efee24dddc4f59d78 SHA-256: 040a7ff3161f48f471caf8c9eb76476e42e5a1a1bed68a54f140e53086cdf2bd
194 Risk Score

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=angular%202%20formgroup%20directive In PDF document text
    • https://cdn.sqhk.co/sidamebo/hzV4MkF/gajokoxuwuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/dgfiigj/burn_your_fat_with_me_fg_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/diehKhg/anti_theft_alarm_sound.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/ggJnYic/63432711545.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/gcxjhCr/ruvosirejulemonux.pdfIn PDF document text
    • https://mozufidapu.weebly.com/uploads/1/3/4/0/134012608/meguvaxupenalas_jebok.pdfIn PDF document text
    • https://wotutokope.weebly.com/uploads/1/3/5/3/135315373/733bf569cb76e1.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/xezonijida/60483178227.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/bmat_section_3_2018_answers.pdfIn PDF document text
    • http://zemabikavowon.rf.gd/andromeda_paid_apk_free.pdfIn PDF document text
    • http://xapakiz.rf.gd/93989189996.pdfIn PDF document text
    • http://sogakusepululir.epizy.com/adaware_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/gomupivikegosironeju.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/free_apartment_rental_lease_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/97525897503.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/romeo_and_juliet_balcony_scene_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/69369684068.pdfIn PDF document text
    • http://zarilapaserit.rf.gd/manualidades_navideos_con_material_reciclado.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_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 5476 bytes
SHA-256: 9ed0223d2a73f5f67be4696eaf74dd75276dd1c02aac2e6c89f056ab21a4584b
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 12500 bytes
SHA-256: 7a318c118f521ebd08cd718ac3a578c2ad11f458c6f114c0408c7e2593c316e2

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