Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e228aa26ba482b…

MALICIOUS

PDF

79.9 KB Created: 2021-03-01 01:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2186193682085301892cb4e9f74f9adf SHA-1: 26f62e0dcf86f5d59d514821ea3c89f8dfe44595 SHA-256: 76e228aa26ba482b8d90d736bf87260b88c26d8cf73d365297b76f441cad4661
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a "mass external PDF link farm". The document body, though heavily obfuscated, contains text related to "Las siete maravillas del mundo 2020" and the wkhtmltopdf application, suggesting a lure to a malicious website. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=las+siete+maravillas+del+mundo+2020
    • https://cdn.sqhk.co/gogerazina/nQjghcd/10096376577.pdf
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/37df0a19f.pdf
    • http://genusadnlo.space/56595547876o4kmq.pdf
    • https://xikanunifozale.weebly.com/uploads/1/3/1/8/131860479/benij.pdf
    • http://antinomi.design/bash_shell_script_for_loop_continueactfk.pdf
    • https://cdn-cms.f-static.net/uploads/4471256/normal_6022a03263cdb.pdf
    • http://itwow.info/18100569526qb7hx.pdf
    • http://zdorovienashevse.xyz/gabatubato8t4l.pdf
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/e14d58f18e6.pdf
    • http://fineagencyy.com/new_book_stephen_king_20193fi6a.pdf
    • https://cdn.sqhk.co/xamowepap/PjiicUI/top_classic_rock_songs_70s_80s_90s.pdf
    • https://cdn-cms.f-static.net/uploads/4490123/normal_601bb2289ba89.pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/72a01c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tonemakopinibem/benjamin_1968_full_movie.pdf
    • https://s3.amazonaws.com/zafijukopa/bovilis_ibr_data_sheet.pdf
    • https://s3.amazonaws.com/dugibabafod/hukumat_bhojpuri_video_free.pdf
    • https://s3.amazonaws.com/wewuxuviwar/56518100313.pdf
    • https://s3.amazonaws.com/mixanaz/99676996902.pdf
    • https://s3.amazonaws.com/bededuxotulapil/9638640721.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f977.bin
e25d02e3714b073427fcaa1969381740224a836eb4cce9a89e07274b7bad5446
pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 5244 bytes
font_01_sfnt_off00010b37.bin
b0fe9afed74962c0753ec97fa3c1f1094540c544a67d602b2753338a28348d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 11456 bytes