Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a298a9eb0a7049…

MALICIOUS

PDF

78.2 KB Created: 2021-03-31 04:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e931f72dfafdb330d19008f429bd6cbb SHA-1: 746f7aadebbb50965e55cd15a7ea955e80c82314 SHA-256: 08a298a9eb0a704920a1189f56b6e9699f1a36142c7d0bee3a3648527d115897
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a large external PDF link farm and a ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of numerous external links, including one to 'botokaw.ru', suggests a phishing or malicious content distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://botokaw.ru/123?utm_term=fers+retirement+planning+guide+2019+pdf
    • https://cdn.sqhk.co/xefijumu/eU29gfp/finely_sliced_iceberg_lettuce.pdf
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/bfa86.pdf
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/7033595.pdf
    • http://wivevadevenumet.mywebcommunity.org/wavelet_neural_network.pdf
    • https://sudopefizumizer.weebly.com/uploads/1/3/1/3/131383323/7879211.pdf
    • https://wexigovepabenu.weebly.com/uploads/1/3/0/7/130738565/dudaxetifoz.pdf
    • http://gewusoluxul.scienceontheweb.net/ciaphas_cain_series.pdf
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/4562839a1.pdf
    • http://liwurivosopap.medianewsonline.com/9535658551.pdf
    • https://cdn.sqhk.co/navimoxa/jbPiijh/siege_world_war_2_mod_apk_download.pdf
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/gebevepukogunux.pdf
    • https://cdn.sqhk.co/vilonunufuk/JhdM3iI/48351919771.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faxiruvud.myartsonline.com/fufibajimomodo.pdf
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_fb70b91e70194e23888edc2f92cfd793.pdf?index=true
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_4de34cd08cf740ccb59b1127348df28b.pdf?index=true
    • https://s3.amazonaws.com/bokofapig/bileik_faiz_hesaplama_forml_ygs.pdf
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_02c5c502ecb04678af763a4feeb42f81.pdf?index=true
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_b76eb6dc54cb4c6f8abe3d46b8e737b7.pdf?index=true
    • https://s3.amazonaws.com/zamemigojat/ambili_malayalam_movie_2019_song.pdf
    • https://s3.amazonaws.com/muxozuvalubi/82859450802.pdf
    • http://manosotidokef.myartsonline.com/noparubeb.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_off0000f19f.bin
6659110982a951903959215f3e6daa9a4ea05e985a05edbf812996603ed90ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 5796 bytes
font_01_sfnt_off00010546.bin
731d57d077aef864e61eda1a43eff537a1ac9b18472201291444b4157476ac91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 11184 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.