Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32449f1c6e71831…

MALICIOUS

PDF

76.2 KB Created: 2021-04-14 05:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5332d14390806b64de6830c85f0561d5 SHA-1: 348e249b883cc12c01c94ae98d722d3abd222682 SHA-256: a32449f1c6e718310d5bff6261f927df295c86462be72b374fb18cc6ad109049
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated programmatically, possibly to disguise its malicious nature and host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://xezojetit.ru/strik?utm_term=the+green+mile+movie+plot PDF link annotation
    • http://vir-tus.com/valizalorarifapamefujofubyajwl.pdfIn PDF document text
    • http://nubolutlion.xyz/samsung_bd-p1600_blu-ray_player_manualjdtre.pdfIn PDF document text
    • http://bodyita.space/742784799556xfxu.pdfIn PDF document text
    • http://cucoupon.info/49171729331kbvrb.pdfIn PDF document text
    • https://nidoziba.weebly.com/uploads/1/3/0/8/130873853/fa6ecc0ee7.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/2471780.pdfIn PDF document text
    • http://digtalcaliper09.xyz/how_to_hook_up_rca_soundbar_to_element_tv6munx.pdfIn PDF document text
    • http://gujavagidaxo.iblogger.org/27718531229.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/rogugagatuf/dexuvovumotelur.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/wolobimuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288a6c77-559f-4eff-a314-67d07fe1ed08/genie_wet_dry_vac_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/6667252794.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/putelup.pdfIn PDF document text
    • http://muwuseb.epizy.com/zamulomin.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/hungry_shark_evolution_game_hack_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/how_to_port_my_number_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/32456843895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5ee657-51e2-4074-830c-e5b40d6c3bb7/sutatodudekovasemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8bfa8a-f27f-4741-94da-4a9f7fb76d07/ask_the_dust_2006_full_movie_watch_online.pdfIn PDF document text
    • http://fezitovowikawof.epizy.com/road_to_hana_driving_map.pdfIn PDF document text
    • http://laliwuremuxifes.rf.gd/26174597011.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/walin.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/computer_deployment_checklist_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b331de-98b9-4aa0-b55f-b75f7f862ce9/yamaha_dgx_530_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca996dab-d61c-4878-a2d9-0fc2848d7596/gazug.pdfIn PDF document text
    • http://givovuzozej.rf.gd/how_do_i_set_my_suunto_core_watch.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 4852 bytes
SHA-256: 1bb48054e9cd99e1c768481a811815f9d5a353fa1b803cf10eaacc7cc7f4f6a1
font_01_sfnt_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 10508 bytes
SHA-256: 248d510b18dac870b6133f9bd94fafe378566c3d2d9f48ffa4e902a4e5e0efe8

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