Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0cbcb736cac046…

MALICIOUS

PDF

73.3 KB Created: 2021-04-03 15:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d7d2aa80a1123a5006eca1f83025e685 SHA-1: c9067bd7fbc84b2fde8072e621c933aad1a304e8 SHA-256: 8b0cbcb736cac046e95d92256e2b0c972ebafff8299e41b73f00ff38b9f3be34
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous external URIs, with one pointing to a suspicious domain ('jumiwimov.ru') that appears to be part of a link farm designed to redirect users. The presence of external URIs and the overall detection profile suggest this document is likely a lure for phishing or malware distribution, potentially using embedded scripts to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=como+hacer+un+archivo+pdf+con+imagenes+jpg PDF link annotation
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/kosuzidoviwut-nimawikubu-diwomulofug.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/pedefenogafe.pdfIn PDF document text
    • http://interbankdigital.com/gejodililayj0e.pdfIn PDF document text
    • https://foziwumiwogesis.weebly.com/uploads/1/3/5/3/135321673/nusokinokijano.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/tasalevilusodenipito.pdfIn PDF document text
    • http://ig-copyrightnotice.com/what_is_the_range_on_a_motorola_cp200wmljb.pdfIn PDF document text
    • http://palitra-cveta.ru/how_to_write_a_poetry_essay_a_levelg10jd.pdfIn PDF document text
    • http://dvestideyli.xyz/nivepe4dl3h.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/abhinetri_kannada_movie_video_songsbdksf.pdfIn PDF document text
    • http://dream-stat.ru/psicologia_anormal_irwin_sarasonqtr5n.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://kawlites.online/gotevolibukitiroy0p3.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/panchatantra_stories_book_in_english.pdfIn PDF document text
    • http://cmb-eco.com/91515582665c6xyh.pdfIn PDF document text
    • http://egrn-order.online/felavazonupesazewidujuzoy8qhx.pdfIn PDF document text
    • http://axecheat7.xyz/xabovobetuxazalapabuwnjg19.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/icom_ic-718_price.pdfIn PDF document text
    • http://getyourscore.info/2432127433ebm83.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/punerupukoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://solejow.myartsonline.com/common_core_mathematical_practices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd24a83-9e31-4e1b-953e-702864fb80c9/how_to_write_an_outline_in_apa_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e8fd9e-0b9f-4b08-8e7d-4f698646da3b/jexamedibawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4da23a-4655-4720-850e-6014556befbd/wubuxojoguwokuridigazilu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 5500 bytes
SHA-256: e8d4ea327a8dac91eeef89fc2b5f5197d5d35d2f67a4d66bd31ba7850dfdab85
font_01_sfnt_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 11280 bytes
SHA-256: c2930d93631e3c87f2aab3aaff1cba1272fc5e321fb928203f1ba4c88f624b09
font_02_sfnt_off000107ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333