Malicious PDF — malware analysis report

Static analysis result for SHA-256 3031ea1471c8e1f7…

MALICIOUS

PDF

74.8 KB Created: 2021-03-18 23:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a61b5b611f9ce132795f3efd7c46e205 SHA-1: 4b0142237a0f5c30705752718d9bbadb916e71a8 SHA-256: 3031ea1471c8e1f7de72f6e68d9e0e7a9bf31f98a84794bf5b89da84ede8a2b0
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=bevel+protractor+least+count+pdf PDF link annotation
    • https://cdn.sqhk.co/retobumoki/figcCjf/69686146998.pdfIn PDF document text
    • http://karaulovlife.site/distributed_systems_mcqs_with_answersnenpe.pdfIn PDF document text
    • http://botavubapisod.mywebcommunity.org/21709020008.pdfIn PDF document text
    • http://instapriz24.site/bavulijusurawogurovamejkt.pdfIn PDF document text
    • http://erogancolumbia.site/22590243437mjtvd.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/hejaSGD/wetolelojovenetikiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/hijgwgc/best_song_quotes_for_instagram_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vigomuraguf/lIvghuW/codigo_penal_de_guatemala_actualizado_2017.pdfIn PDF document text
    • http://nuvekediporere.22web.org/the_awk_programming_language_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://torobedi.epizy.com/jotobafexifaxixob.pdfIn PDF document text
    • http://nagurinetawami.rf.gd/abcd_2_full_hd_movie_1080p.pdfIn PDF document text
    • http://wosamufudov.epizy.com/49008049878.pdfIn PDF document text
    • http://gekasudevij.epizy.com/chainsaw_sharpening_file_guide_stihl.pdfIn PDF document text
    • http://balepififeri.rf.gd/elasticsearch_nested_mapping_template.pdfIn PDF document text
    • http://rexojapabafim.rf.gd/mobile_android_games_site.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/86681787543.pdfIn PDF document text
    • http://wegadikas.epizy.com/pidug.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_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 5256 bytes
SHA-256: 7071248b66b82876ff12942e32a5ac81dc957b6d1d1421d0da709507d511dac7
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 10636 bytes
SHA-256: 204c02f10fbe7d91c5d44145d5751eff393209df920ef132c222110a149cabf6

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