Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ff097146d73316…

MALICIOUS

PDF

80.1 KB Created: 2021-03-14 19:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4eda8e8bde19ec6bdb38edc3681f2190 SHA-1: c76d9a05a2bb63c6c78b84c4a21a7db1ff846aab SHA-256: 83ff097146d733165c90e46f6a16feb190fe76dfe967096eea3ab7eb394fb712
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with several pointing to suspicious domains and one specifically noted as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a report context, likely a lure to encourage users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=flexural+strength+test+report PDF link annotation
    • http://good-production17.site/child_support_phone_number_texasu5rca.pdfIn PDF document text
    • http://lifeeuro.info/integral_2_sin_x_-_3_cos_x_dxu1zcu.pdfIn PDF document text
    • http://sunmarkt.ru/how_to_increase_volume_on_nortel_phone0hc5n.pdfIn PDF document text
    • http://mkr-olimp.info/rugixo2r4on.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/99gf8je/regal_cinemas_movies_showing.pdfIn PDF document text
    • http://wigewanadowo.22web.org/to_the_moon_and_back_book.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/DUbja81/industria_alimentaria_historia.pdfIn PDF document text
    • http://freehookup.xyz/5416743241895ms8.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/jgjgYvW/mini_games_for_pc_free_download.pdfIn PDF document text
    • http://masterpowerpoint.com/78754096886caaxj.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/nemafu/tencent_emulator_pubg_mobile_terbaru.pdfIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_34b07bf749974d8e96a77fcb910a346e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/verasovoxarokidevelewet.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_ed11147f75944f9f9d11700503963369.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/34168005070.pdfIn PDF document text
    • http://xanokilil.rf.gd/30348304484.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_9b4c7e86553346d0bdeeec32039f2c0b.pdf?index=trueIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_990bfdb6a0a4447b92dc71d9df05e62a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 4940 bytes
SHA-256: b4c178055f90cbc789c4deae8d1496ee2abeec072f0181447371903719e84810
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 11200 bytes
SHA-256: e1d9b53e9b24ec5192cea064bf5ea79a89ee2c8d9ec1f57c5c3d08b26f766fc7
font_02_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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