Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0f07014034e919…

MALICIOUS

PDF

77.6 KB Created: 2021-03-21 04:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 578e1f5f82b54fc91bc643d1dbe0802f SHA-1: 750271e55a0878d6757a2cbbd6d575dcad5fd5b6 SHA-256: 3d0f07014034e9197cb8016701696ef3e95ac6209834c44424ed0d16dca050fc
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains embedded URLs, one of which, 'https://ponafet.ru/award?keyword=passive+writing+exercises+pdf', is presented in the document body as a passive writing exercise, a common lure for phishing or malware delivery. The presence of external URIs and the overall detection suggest the document is designed to redirect the user to a malicious site, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=passive+writing+exercises+pdf PDF link annotation
    • http://beremoter.online/origami_tessellations6t4iu.pdfIn PDF document text
    • http://teachersaid.fun/mofipugozevuwobebodoti8t9zy.pdfIn PDF document text
    • http://coolmag.biz/dragon_age_inquisition_game_guide1k85s.pdfIn PDF document text
    • http://photoforce.ru/pamisudoninetimawekiru9l2ya.pdfIn PDF document text
    • http://usesol.xyz/como_cerrar_manualmente_el_quemacocosnh28u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_604ced9178f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_602405a25b709.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/zulezov/wrangler_men_s_performance_shorts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc85239-4b25-45fe-aa92-f9f8783e5f9b/64972095567.pdfIn PDF document text
    • http://kotopofixivu.rf.gd/88612830197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f888fc-9992-4c6f-a168-4a929c84f661/bowotononapipudoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab391bb7-c5c9-4bfe-99ae-43203ca05732/acer_aspire_v5_11.6_touch_screen_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/75324539207.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/rojetoravunifojelux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa004329-63e7-4794-951a-638049cc4c78/black_box_g1w_dash_cam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b81c46-ffa7-4ae2-bdbf-4e10b474635d/71105851369.pdfIn PDF document text
    • http://fomigidaxek.epizy.com/tikovuzolazu.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/zakaporekavaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/fixurisopukuba.pdfIn PDF document text
    • http://sejozewixexoba.rf.gd/kapemijabojejomesevoduvas.pdfIn PDF document text
    • http://jabuzom.epizy.com/how_to_support_child_with_autism_in_the_classroom.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_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 5512 bytes
SHA-256: f7eb1d2c597168290ed13b475b3690b70c535b50964afbf40b84b55b7dcfde0f
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 10916 bytes
SHA-256: 9bb50392f9adc4677202ca0135cfbcd82019efe73e1deeec450bcf00fe13878c

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