Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b153cb47d6987a9…

MALICIOUS

PDF

74.6 KB Created: 2021-03-28 01:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736f20605ae8a0d01e3a72b2f9d717da SHA-1: 2a115651b48fa84f7f569a976d58d29a6f3f59b7 SHA-256: 5b153cb47d6987a90eb34884ebb9ee18ef85e5c7ffdbf838863eaedb35cbe6d6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to 'Niv bible for android free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=niv+bible++for+android+free
    • http://rimiminigi.22web.org/wadexetukajarokopujepat.pdf
    • http://wunadimizurened.medianewsonline.com/when_was_the_kitchenaid_mixer_made.pdf
    • https://cdn.sqhk.co/womafafowix/MIicZYv/hungry_shark_world_hile_apk_arivleri.pdf
    • https://cdn.sqhk.co/fasegibuniz/jchiihy/color_shift_puzzle_ball.pdf
    • http://silewugebed.scienceontheweb.net/access_grade_6_student_book.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_605712400a33c.pdf
    • https://cdn.sqhk.co/peluxisomex/jgiahds/directv_now_free_trial_firestick.pdf
    • https://cdn.sqhk.co/gawukale/hihawL8/xitepakirigejuzujalekigiv.pdf
    • https://static.s123-cdn-static.com/uploads/4469643/normal_5ffb8ca0bfbda.pdf
    • https://cdn.sqhk.co/patagarinixa/eRicpgg/27608747580.pdf
    • http://xadexawufomovi.sportsontheweb.net/teenage_romance_books.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fizenigapajawak.epizy.com/fedex_tracking_contact_number_near_me.pdf
    • https://s3.amazonaws.com/ladiwuzetawedi/xeleragedawiku.pdf
    • https://s3.amazonaws.com/dazuxujepov/incident_report_sample_letter_school.pdf
    • http://guzeberipavol.rf.gd/meforizasatakalakajiri.pdf
    • https://s3.amazonaws.com/fezenur/75850386397.pdf
    • https://s3.amazonaws.com/xazarujokemus/bowezudukeses.pdf
    • https://s3.amazonaws.com/tomaxade/bootstrap_contact_form_html_code.pdf
    • https://s3.amazonaws.com/gosete/2008_ford_escape_oil_type.pdf
    • https://s3.amazonaws.com/bagisi/niwus.pdf
    • https://s3.amazonaws.com/satulibaren/davis_vantage_vue_transmitter_battery.pdf
    • https://s3.amazonaws.com/gavobawum/gasket_sheet_near_me.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c3.bin
359dd8eab626b01850b9d40e7ba4b4e11319fa71b7b0d943a2ab345d3eaf8c13
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 4892 bytes
font_01_sfnt_off0000f87b.bin
6535e230252680eea26b893d90293a574ea541baef3f5e15f46a1138e82cacbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 11092 bytes