Malicious PDF — malware analysis report

Static analysis result for SHA-256 1171f3811c16b2c2…

MALICIOUS

PDF

92.7 KB Created: 2021-04-01 07:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f618ebf530631c9cb793ca915c79a7d1 SHA-1: 516fbe24947f20f75b7fb75901b943f7219bdb45 SHA-256: 1171f3811c16b2c260beba411210886d732a6db770261f02240b440f534d3cf6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with a phishing lure. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=rode+videomic+pro+iphone PDF link annotation
    • http://uscarins.info/sueo_de_una_noche_de_verano_shakespeareh0eko.pdfIn PDF document text
    • http://5dradio.ru/the_lexus_and_the_olive_tree_booku2aur.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/gidepovesam_naxibavutizel.pdfIn PDF document text
    • http://opt05.ru/92429895168lscil.pdfIn PDF document text
    • http://zekabivalejasaj.22web.org/moniwag.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/e43340b47d55c3.pdfIn PDF document text
    • http://paximosikelos.22web.org/bassinet_fitted_sheet_adairs.pdfIn PDF document text
    • http://ijmalan.xyz/comcast_cable_box_costuz7w5.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/wigimipiwukuzewutup.pdfIn PDF document text
    • http://lbaranaydin.com/wozejasunid8izb.pdfIn PDF document text
    • http://prizinsta.online/413337997631ndl9.pdfIn PDF document text
    • http://afterdealer.pro/hp_officejet_4500_g510_nz_driver_windows_71znra.pdfIn PDF document text
    • https://jutoxanifi.weebly.com/uploads/1/3/5/3/135321179/796da2ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisunamubeso.epizy.com/11891833061.pdfIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_60afb863bd4249f5a75313bee996e286.pdf?index=trueIn PDF document text
    • http://femodizabofowu.epizy.com/samere.pdfIn PDF document text
    • http://wuzazuj.rf.gd/best_games_for_android_tablet.pdfIn PDF document text
    • http://zetiguseje.rf.gd/gross_domestic_product_income_and_expenditure_first_quarter_2020.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_3b251a914bfb4d5c90569f1370d24e15.pdf?index=trueIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_e35ae2463e6d4cc5b188704d37138476.pdf?index=trueIn PDF document text
    • http://rijevugez.epizy.com/zirezibumarilubo.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/firefly_2_vs_pax_3_vs_mighty.pdfIn PDF document text
    • http://wolekepivezune.rf.gd/fhwa_report_bridge_deck_drainage_guidelines.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_off00012b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B34 4960 bytes
SHA-256: d5c048811c7b0f6857b9ceae7e0bd9f76162595c5d19702e96bd4027748bd1d5
font_01_sfnt_off00013bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF4 12480 bytes
SHA-256: 7b6b88f455766af0ef13181c4d694b57ce32c953c1b3eab854ed0c93f546c1f3

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