Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcb0cd06c2a8309…

MALICIOUS

PDF

76.2 KB Created: 2021-03-29 23:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d4b7486cb2264e0755dd903235893608 SHA-1: 9ce0cc4ffa3e22fdb89e22c03a8c33703f58188f SHA-256: 9fcb0cd06c2a83097a73a4de35a1087d169ccf244ceebc58aee2765b06667448
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified as 'https://seumenha.ru/wix?keyword=era+of+celestials+mod+apk+2019'. Heuristics indicate the PDF functions as a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded URLs and the link farm heuristic suggest an intent to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/wix?keyword=era+of+celestials+mod+apk+2019 PDF link annotation
    • http://wozutujetotox.iblogger.org/46851230550.pdfIn PDF document text
    • http://pagexonani.iblogger.org/6539078638.pdfIn PDF document text
    • http://bifilazona.22web.org/seritowatenopadimiged.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/fe3haqx/fun_race_3d_y_run_race_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/icWWw2Z/sneaker_hd_wallpaper_iphone_8_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/rusukumuva/higg6oM/top_10_richest_football_league_in_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/o4b2kjO/sademulupomaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibuzijuta.epizy.com/the_rules_book_review.pdfIn PDF document text
    • http://gusadixesexa.epizy.com/31786666309.pdfIn PDF document text
    • http://wijexir.epizy.com/dictionary_oxford_free_download.pdfIn PDF document text
    • http://fowidosufos.epizy.com/22301908285.pdfIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_067e0886688144108e75ca7c9883827e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e097a476-5edd-4035-a8b5-41cc0cf3dcf3/where_is_the_starter_relay_on_a_2008_dodge_avenger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a7f451-42b1-455a-b51f-0ca29f847460/cuantos_dias_tiene_un_ao_y_medio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f7c764-d3f0-4190-b202-ec87e680ef27/how_to_charge_black_and_decker_18_volt_battery.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_2d46b54f3dbd413fac77749d38df01ac.pdf?index=trueIn PDF document text
    • http://podifugugak.epizy.com/sosolu.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_off0000e7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CB 5804 bytes
SHA-256: 93791443ce73370800044d78c78d298fbef7df893e4ba076a144ed7863017679
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 11628 bytes
SHA-256: 7b5fe4c963ed99835b08286969465652d46cd6f05e67ec669443aa5942aca10f

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