Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd918ba3cda4d1bb…

MALICIOUS

PDF

71.1 KB Created: 2021-01-23 16:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 65ea5f969c38820a7de489247d02e6cd SHA-1: 973125f6ee0bdf4cf28df90d9b02fd044304be58 SHA-256: dd918ba3cda4d1bb97fdd5c77184f702db32362900832b82b85b0eae1d692cd9
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the PDF and its embedded links point towards an attempt to trick the user into navigating to malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=wapking+new+bollywood+video+song+2018 PDF link annotation
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/4389788.pdfIn PDF document text
    • https://site-1244605.mozfiles.com/files/1244605/avalon_game_rules.pdfIn PDF document text
    • https://bujajegufo.weebly.com/uploads/1/3/4/1/134108800/7871d51d53.pdfIn PDF document text
    • https://site-1178950.mozfiles.com/files/1178950/dingleberry_definition_animal.pdfIn PDF document text
    • https://site-1166674.mozfiles.com/files/1166674/18504331301.pdfIn PDF document text
    • https://site-1235182.mozfiles.com/files/1235182/smart_watch_bluetooth_android.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/sidelo.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/2281779.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/istanbul_not_constantinople_sheet_music_violin.pdfIn PDF document text
    • https://site-1176114.mozfiles.com/files/1176114/herpes_simplex_10_month_old_baby.pdfIn PDF document text
    • https://site-1176684.mozfiles.com/files/1176684/jm_fiberglass_insulation_data_sheet.pdfIn PDF document text
    • https://site-1246605.mozfiles.com/files/1246605/nozokewunefisojutero.pdfIn PDF document text
    • https://site-1171757.mozfiles.com/files/1171757/54914719360.pdfIn PDF document text
    • https://site-1176684.mozfiles.com/files/1176684/untitled_the_walking_dead_movie_release_date.pdfIn PDF document text
    • https://site-1175164.mozfiles.com/files/1175164/2143629087.pdfIn PDF document text
    • https://site-1172089.mozfiles.com/files/1172089/home_assistant_alexa_media_player_volume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genenapukiral.epizy.com/collins_grammar_for_ielts_cd.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/8608966212.pdfIn PDF document text
    • http://toxezapa.rf.gd/borland_delphi_7_free.pdfIn PDF document text
    • http://tijiwef.epizy.com/rational_fasting_elliott_hulse.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_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 6020 bytes
SHA-256: 3315c40c8d3a83e14a7d67e4a9cab9cc436996e27764d27876eeac16f1f5cd29
font_01_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 10220 bytes
SHA-256: faeb4f4c4c5f2b9f12a143f8cba9a7ccfaf9e8a5c28847ed191b0ff9d5d108bb

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