Malicious PDF — malware analysis report

Static analysis result for SHA-256 9329cbc44abd3d1b…

MALICIOUS

PDF

73.4 KB Created: 2021-04-03 02:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 490633c24326526dcf4fd3adab283d2c SHA-1: cdb460226c175bb0a44fb25887ec60661f647b79 SHA-256: 9329cbc44abd3d1b2de12c4a2ff497d065fce853e5f043f60e12652593f5b5d5
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with a notable heuristic identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/award?keyword=gasometria+cordon+umbilical+pdf PDF link annotation
    • http://sehq.xyz/zuzidokirixipe5coqo.pdfIn PDF document text
    • http://esclub.pro/satellite_radio_italian_musicw5bm5.pdfIn PDF document text
    • https://zisamezasebav.weebly.com/uploads/1/3/3/9/133997726/firobilutojujuz.pdfIn PDF document text
    • https://deponoma.weebly.com/uploads/1/3/2/6/132696267/zarobugodune.pdfIn PDF document text
    • http://madamzero.com/demonstrative_pronouns_worksheets_for_grade_3fvaw6.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/2020_malayalam_calendar_printable.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/what_is_a_good_portrait_lens_for_nikon.pdfIn PDF document text
    • http://good-production18.site/stihl_petrol_strimmers_for_sale_near_me6mf1z.pdfIn PDF document text
    • http://frut-tree.site/49195406258p3zlw.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/5146290.pdfIn PDF document text
    • http://gamedv.design/178250068991qdji.pdfIn PDF document text
    • https://fivitilanafime.weebly.com/uploads/1/3/5/3/135395402/podakerubafewumi.pdfIn PDF document text
    • http://1offpark.xyz/barbie_games_free_for_windows_10spn7z.pdfIn PDF document text
    • https://vejamepune.weebly.com/uploads/1/3/0/7/130776484/viwupufigoxexoja.pdfIn PDF document text
    • http://7lessons.fun/numuwesupapowogujokejd8nv.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/aurat_foundation.pdfIn PDF document text
    • http://oneitstore.info/entry_level_technical_writing_jobs_austin_txkqk1o.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/db3b5554-7461-41d5-8da3-209645569b89/wing_chun_2010_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/what_does_the_poem_in_flanders_fields_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf392f4-a8f3-43e0-9a65-eb227a6324e3/daikin_mini_split_error_code_00.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/android_sdk_version_popularity.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/25481458779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec25f32-be12-49be-96f7-cebc4f1587b5/diripaxidowewogubidor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c85fe2-5fe6-461e-bd1f-cb51e32cc7b1/27265780454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55c27e5-cabe-4350-a894-059e71bf3484/jopajog.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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 5472 bytes
SHA-256: 467652a9aeb15c69359eaadab2c0791bc5309b7a0e123560c7af0e667c7d3fce
font_01_sfnt_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 11480 bytes
SHA-256: 394226a1520d243b6de88dbc71c20c99beee22b13c9a11b577d3ef911297e32d