Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d43bbf535c724fd…

MALICIOUS

PDF

78.0 KB Created: 2021-03-17 05:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e280a99e6b3848cae091fea5464114cc SHA-1: 192ef56c059e49b68f6037bdce397dfd63c0f5e8 SHA-256: 6d43bbf535c724fde8bba6955a40b101bbcba9df6de2a131042efd3531e48b0a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The PDF contains numerous embedded URLs, with a notable one pointing to 'bologen.ru', suggesting a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's structure is designed to host many links on disposable domains, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://bologen.ru/wix?keyword=ventajas+y+desventajas+de+facebook+live PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448535/normal_603d1c02ae865.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/hp_laserjet_pro_400_mfp_driver_windows_7.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/batafesabowuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368740/normal_60031bf4772bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458838/normal_5fc98c16bd5fa.pdfIn PDF document text
    • https://bikekifo.weebly.com/uploads/1/3/5/3/135304891/veruv.pdfIn PDF document text
    • https://pununoruvok.weebly.com/uploads/1/3/4/6/134693134/1215369.pdfIn PDF document text
    • https://cdn.sqhk.co/tulotunofuz/idkggja/26024149544.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/39d8e.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/127152.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenilu/qhaB4id/screen_recorder_with_facecam_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/ggjjawr/29628778020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5ff002717db93.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/tasitimisut.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/jicpSgf/92411646684.pdfIn PDF document text
    • https://tetusujofejami.weebly.com/uploads/1/3/2/6/132695476/0dc5aa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fc5d72015152.pdfIn PDF document text
    • https://zanugikujo.weebly.com/uploads/1/3/4/3/134399251/df392.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/jqHGXge/26645422183.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/kilizuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d7de90-ed80-460a-a5b3-f7850aecf8af/39819249559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e4193a-f38e-41e6-8eab-812e0ac32468/which_steam_mop_is_best.pdfIn PDF document text
    • http://mojozore.myartsonline.com/dutosefitipuxof.pdfIn PDF document text
    • http://gajamozaxekega.atwebpages.com/biafra_war_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3575416b-78e2-4a31-85ec-fc44efaac2ca/how_to_program_my_uniden_bearcat_scanner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eee391a-80f1-4e46-bb57-275ce6b53349/gusotodigejapogawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6049f21f-ab41-41fc-998c-6674b5694abf/how_to_download_rslogix_5000_emulator.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_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 5324 bytes
SHA-256: a6bc0eb9f68b66b31a618a8641095893962b18f5b7b2361037e19249304d12c7
font_01_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 12708 bytes
SHA-256: 569847f2c281c86bebf9d4fefac6a8f1a142acb5ba51b86884d11e7677dbd280