Malicious PDF — malware analysis report

Static analysis result for SHA-256 b176040621bb7ba1…

MALICIOUS

PDF

78.5 KB Created: 2021-06-12 14:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 208fb51a0816a6f6b8bd29358716f2a5 SHA-1: c96b198c2ef6167e29a6acaf22eef60b6943a504 SHA-256: b176040621bb7ba1d6cce4b155704ab0d070038ecbaa91ed020b65b32889f10d
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure for movie downloads, which is a common tactic for distributing malware or leading users to phishing sites. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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.
  • 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://wastran.ru/pbw?utm_term=aquaman+full+movie+2018+english+original PDF link annotation
    • https://tozakewa.weebly.com/uploads/1/3/5/3/135398337/fodiz.pdfIn PDF document text
    • https://xurozakewera.weebly.com/uploads/1/3/1/4/131414240/wolukufigurojab_vefaje_xomuruwotiner_gigami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fc5ab6b194fd.pdfIn PDF document text
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/2bdbb85089.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fe3407dc80f2.pdfIn PDF document text
    • https://wubugivaruj.weebly.com/uploads/1/3/4/6/134669137/digovuru-zutegawez-sulaxikimijuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489251/normal_60025a1974b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_600ce24d91ee2.pdfIn PDF document text
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/fekuje.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/2313032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_602bafaa8425c.pdfIn PDF document text
    • https://giwisosolu.weebly.com/uploads/1/3/4/7/134752077/tozaxukenuma.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/79e32564-b430-4cbb-91c6-3745db68a685/tavupugugogerekev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25735f7f-4cbf-40dc-aacf-85d3efcdfc57/100_verbos_en_ingles_y_espaol_en_pasado_presente_y_futuro.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/f/22740923341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b534176d-daaa-442c-b906-b13daf1d810a/how_to_make_papaya_seed_oil_without_oil_press_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eccd9cb-fb00-46ed-b6d6-223811d1cae9/fowiloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0627b5-ac0f-4679-a382-583411120c37/similarities_between_neoclassicism_and_romanticism_art.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/how_to_find_my_saved_passwords_on_android.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/wo_ladki_nahi_zindagi_hai_meri_song_download_mp3_bestwap.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144547422/17945017985.pdfIn PDF document text
    • http://natetusiwuwo.pbworks.com/f/rojeliken.pdfIn PDF document text
    • http://pimepovume.pbworks.com/w/file/fetch/144559320/how_to_clean_my_rowenta_perfect_steam_iron.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_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 5876 bytes
SHA-256: 17a4fc800daf7a530f7fb7ff8c697ada7a4ae1d0bc0b855ea653734369ef3473
font_01_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 10624 bytes
SHA-256: c68ee2e28406b6adf608cdff3682776f1cabcee342eb5de2773cb92bec1aebf7

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