Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffddb0f8fc1a8ada…

MALICIOUS

PDF

69.4 KB Created: 2021-03-26 12:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a3a75c96dbfd95cc6d259cb7c50679bb SHA-1: 21a0164b6dfc433117cc3958093ee758082009db SHA-256: ffddb0f8fc1a8ada54cd79a7d77115f63877e7b1656b692a9099f72cd06134a5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=what+element+is+in+every+living+thing PDF link annotation
    • https://nanuvofekoredam.weebly.com/uploads/1/3/5/3/135385966/gofezuvibizobid_doxonakekux_tewumezam.pdfIn PDF document text
    • https://biramufon.weebly.com/uploads/1/3/4/7/134775887/4376202.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/ragab.pdfIn PDF document text
    • https://cdn.sqhk.co/bisulalu/ECZjdcB/vitomemosod.pdfIn PDF document text
    • https://rukegimamu.weebly.com/uploads/1/3/3/9/133986924/wavulijazofal.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/hhijcgh/image_editor_for_windows_7_32_bit.pdfIn PDF document text
    • https://muwivagejexe.weebly.com/uploads/1/3/1/3/131379070/5352376.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/jewoleraf.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/ijbAejc/highway_moto_rider_2_mod_apk_download.pdfIn PDF document text
    • https://nobepitolixedi.weebly.com/uploads/1/3/4/5/134516182/fedej_ludolofete_nufagapod.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/SeAjjG4/mejatakav.pdfIn PDF document text
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/2292557.pdfIn PDF document text
    • https://ziliseze.weebly.com/uploads/1/3/4/8/134855349/kopelonididedi_vikajo.pdfIn PDF document text
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/7651343.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/pilazi/danganronpa_2_chapter_3_trial_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/formation_communiquer_avec_ses_guides.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_b31081007f364557af6aeab19383bc79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/xukazageziwupivigamak.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/xapukuzususonuwipis.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_a7e7521704a54eabb8c8a3fc07eff4d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/heart_failure_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/82103816858.pdfIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_f61e2f916cf1497e9530719fa8e49dcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/easiest_way_to_see_mt_fuji_from_tokyo.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_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 5272 bytes
SHA-256: b60a170062bc344e44384d034c359cf6bae7a3d691f7f1e68efe6ee8fb2785f6
font_01_sfnt_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 9748 bytes
SHA-256: b9054579210522f97d6a693d09a4a2413d384e96047feaef0f08991ee417aaab

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