Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5cf238fe508f4c…

MALICIOUS

PDF

73.6 KB Created: 2021-02-25 21:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c072ba0e654513a4da6dc3642805a311 SHA-1: f8e58389c0fe0f5281c4687faf8bfbaeb6c7ce62 SHA-256: ab5cf238fe508f4c74575bc425c5f4e3ce7d0984d1b8eac6a0f9ba31946a7ef2
134 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were extracted, the presence of external URIs and the 'Urgency / deadline lure' heuristic suggest the document is designed to trick the user into clicking a malicious link, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/award?keyword=we%2527re+gonna+party+like+it%2527s+your+birthday+clean PDF link annotation
    • http://usejus.pro/assassin_s_creed_origins_trophy_guide_powerpyxtp3up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_6035bdc017556.pdfIn PDF document text
    • http://tebaxedo.22web.org/trena_laser_bosch_glm_40_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_60205932b8072.pdfIn PDF document text
    • http://ralenexixozuk.iblogger.org/bottom_up_approach_for_nanoparticle_synthesis.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/ramifevovi2viv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_600fee5349938.pdfIn PDF document text
    • http://blancer.xyz/how_do_i_make_him_fall_in_love_with_me_againk4am4.pdfIn PDF document text
    • http://freefire-gifts.com/korean_music_show_wins_2020zrgkf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_6026389f0208b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_5fe60ae19fa75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_60147b6d19b4c.pdfIn PDF document text
    • http://iuts.space/ixl_sign_in_new_rochelleoy0bh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_600e558d433a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarinag.epizy.com/37430735353.pdfIn PDF document text
    • http://lapakak.rf.gd/synonyms_list_with_urdu_meaning_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/rujosuzizinutilejifofiv.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/josudujemotekogijuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/brisbane_tv_guide_free-_to-_air_tonight.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/wewum.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/xukorebavenebisidopuwazi.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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 5688 bytes
SHA-256: 0efdb9316c3e1be0336e8569f7059c8820ad3a7e125d9f681d87948808b3ab7b
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 9432 bytes
SHA-256: f9009c91e35bafef719c282aa75235179854b29bbddb7de042d2067888fea130

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