Malicious PDF — malware analysis report

Static analysis result for SHA-256 311b320fb932131d…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 05:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 924d2dc72acde33ed91d8cb8e1e3a47b SHA-1: ee2eff3c55ef43cc9616770d68ba5439788e6075 SHA-256: 311b320fb932131d91d28f7b0e98c71dbb38f3dcbdfdbcfb7cd95518d29008c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/aws?utm_term=country+music+baby+got+back PDF link annotation
    • https://cdn.sqhk.co/bularalunop/hb2jd3Y/bewufutuje.pdfIn PDF document text
    • http://meriline.store/35935322281c9nht.pdfIn PDF document text
    • https://basalolevezuw.weebly.com/uploads/1/3/1/6/131606508/6a6512.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/hjciajd/ottoman_empire_conquered_rome.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/the_aspern_papers_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/2hdF2gh/snow_trails_ski_swap.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/dogs_are_better_than_cats_essay_conclusionvfflx.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/i2jihfn/braains._io_unblocked_at_school.pdfIn PDF document text
    • https://riganekonima.weebly.com/uploads/1/3/0/8/130874133/5081911.pdfIn PDF document text
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/bizeno.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/repedoxumalunir.pdfIn PDF document text
    • http://erethiztzj.space/wallpaper_iphone_xr_4ksk833.pdfIn PDF document text
    • http://maska-respirator.com/descargar_discografia_de_julion_alvagz0r5.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/runorabeteboro.pdfIn PDF document text
    • http://1xbets-reg.site/tap_the_frog_2_free_download9uxr4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luxelula/angel_has_fallen_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190f72f8-7985-4c33-9301-d0286477dc16/an_american_childhood_by_annie_dillard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09194d3-fdac-4193-ba9e-8b9b90dce507/what_is_the_remote_control_code_for_a_vizio_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/safaxuxinelora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e7379b6-a410-49d7-9411-b5ff85f3858c/how_to_find_slope_from_two_points_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52a6935-1765-4d72-af60-4d2b4031f96a/the_old_woman_of_beare_poem_summary.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/fybsc_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/69698856916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3220b32-f899-45ef-9a14-94ab84dc7fe4/narrative_of_the_life_of_frederick_douglass_chapter_1_summary.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_off0000e772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 5180 bytes
SHA-256: 7b693fdc6de03285327f3fcabe330af9cc51db2c4db0e467cc147efb1b96bcd5
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 10888 bytes
SHA-256: 18f7e4cf92fed2ac33d14b2f06ad3251a3ad17392dbc33d79a9a5ecd901686fe
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3