Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5a3acbef244141…

MALICIOUS

PDF

77.0 KB Created: 2021-06-10 08:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7a0f1d2f7594c8adc5ea89753ea4d4 SHA-1: d1ef1fa5bf2b38e87c2c098ad0551e7a46c791e8 SHA-256: 2f5a3acbef2441418ed83f5afb9bdb4df944bbedbf1fa6e9e70a2df635858103
156 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free robux' and exhibits characteristics of a link farm, directing users to numerous external PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host and link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/pbw?utm_term=free+robux+card+2020
    • https://vesepuzimimewij.weebly.com/uploads/1/3/0/7/130776402/6305ffd0fa.pdf
    • https://fadoxidibeja.weebly.com/uploads/1/3/2/6/132695582/2191790.pdf
    • https://zoboruzini.weebly.com/uploads/1/3/0/8/130813320/radoma.pdf
    • https://nunifabemavi.weebly.com/uploads/1/3/4/8/134871907/xeparumevumo_wabuludak_lejidew_guluvuferi.pdf
    • https://fifesijewawo.weebly.com/uploads/1/3/1/4/131412558/binavagixakiperi.pdf
    • https://static.s123-cdn-static.com/uploads/4410201/normal_5fcf0c2c7f7e2.pdf
    • https://jagedebake.weebly.com/uploads/1/3/0/7/130738918/1853673.pdf
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/vizipezeson-golada-nitixe.pdf
    • https://static.s123-cdn-static.com/uploads/4412570/normal_5ff8cc981c5db.pdf
    • https://cdn-cms.f-static.net/uploads/4489586/normal_603b4149c6da6.pdf
    • https://wipolupenigikof.weebly.com/uploads/1/3/2/7/132712614/12bdfc8.pdf
    • https://bimeriwuju.weebly.com/uploads/1/3/4/9/134901074/9548895.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/19d62822-fea4-4bee-befb-ad7df41811df/84611067664.pdf
    • http://juzifezazuk.pbworks.com/f/murujuzuvu.pdf
    • https://uploads.strikinglycdn.com/files/f8670a22-937b-4fbe-abd9-149f336f8a10/pj_masks_racing_heroes_game_free.pdf
    • https://uploads.strikinglycdn.com/files/d6015959-0d1b-417c-9a86-a9a82b11da61/descriptive_analysis_in_qualitative_research.pdf
    • https://uploads.strikinglycdn.com/files/391b2ef3-4735-403a-a89e-195e79d62a10/ms_excel_2007_complete_tutorial_free_download.pdf
    • https://uploads.strikinglycdn.com/files/df2dc240-78a7-4ebf-9e7f-61b0dad86ebc/is_toshiba_ct-rc2us-17_a_smart_tv.pdf
    • https://uploads.strikinglycdn.com/files/e9452725-52f6-4d83-bc4b-a6d2f213311d/zejedupepegivaxor.pdf
    • http://bunemirudezo.pbworks.com/f/xuzumusomife.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f2.bin
71cc90309bb7108423b7176e0cfa55ba78ab3489aa07662993240f6d522728c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 4808 bytes
font_01_sfnt_off0000f44f.bin
e1202a64669805e6b87ac0f4ee047e4bd6075eccb6c778538f5ddad6c24c6651		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10660 bytes
font_02_sfnt_off000118a8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A8 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.