Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03204cbce729ca6…

MALICIOUS

PDF

83.2 KB Created: 2021-03-17 21:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7bb1c00673819f05ba40922bbe6e7e0a SHA-1: 17e806b8328cf012c5495c0908cd9451cd5b7f2a SHA-256: d03204cbce729ca67deedeb7f3e0d516f9a4af29359601aa52d23c82ed50bddd
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://midufefew.ru/award?keyword=free+twin+loft+bed+plans+pdf PDF link annotation
    • https://cdn.sqhk.co/gitogozune/haheghi/posopulupamibewutalojes.pdfIn PDF document text
    • https://nugobobunebiset.weebly.com/uploads/1/3/5/3/135303429/koferebipo.pdfIn PDF document text
    • https://cdn.sqhk.co/nupopobax/hjc5a1w/2415594140.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/fiinjd2/23032764015.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/7ayhaha/mimpikita_bridal_price.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/RgGVig7/zoom_cloud_meeting_app_guide.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/2812616.pdfIn PDF document text
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/f101d8f87b20fe6.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/vWhdrT7/53168288674.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/Njghf3Q/yahoo_weather_forecast_chakwal.pdfIn PDF document text
    • https://josojizaxa.weebly.com/uploads/1/3/5/9/135966587/162218.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/HUPjfhi/97145899941.pdfIn PDF document text
    • http://degitowexara.iblogger.org/as_is_no_warranty_form.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/b2fb83be-7089-4bc1-8633-9ca00f6a24ea/how_to_draw_flowers_in_a_vase_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab71d847-c4eb-4fe9-b448-e2b683c94e54/biwizikegikosonule.pdfIn PDF document text
    • http://vetebiba.rf.gd/espresso_english_level_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b5201f-97ec-44c9-a563-45fc52333702/nevonug.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/autumn_leaves_chris_brown_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649807a6-f121-436e-8107-88ee811b744a/tipos_de_instrumentos_de_medicin_o_recoleccin_de_datos_cuantitativos.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/root_checker_apk_uptodown.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC1 5220 bytes
SHA-256: 8778d4a68d8e6efe88b8e76a7d996a2b99ff6c94a9275cba3b63a9b989e9100d
font_01_sfnt_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00011a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A23 10768 bytes
SHA-256: 477d366eaaa76b7558a1a8c6beb41f96fcde821232fc4b9d52f029b2a741d604