Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd48a94cb884c42c…

MALICIOUS

PDF

75.6 KB Created: 2021-03-07 08:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4b957e78e04fca6217e8388b186e6642 SHA-1: d52718c8fe89c8b139cadad685784563094c3e1c SHA-256: dd48a94cb884c42cadb42089bcc909404b329646e0ec80bb3dbfafe1340349d9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs pointing to suspicious domains, and heuristic analysis indicates it's a link farm designed for malicious purposes. 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 URIs are indicative of a common attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=brother+mfc-8480dn+service+manual PDF link annotation
    • http://creditscorehelp.info/soylent_green_torrentxw8jy.pdfIn PDF document text
    • http://tezatigobupuvu.22web.org/how_to_turn_on_resound_hearing_aid.pdfIn PDF document text
    • http://xobuxok.22web.org/vuzogi.pdfIn PDF document text
    • http://mazonenebu.22web.org/romujexefewamopat.pdfIn PDF document text
    • http://digakegenuses.iblogger.org/the_heirs_ep_2_tagalog_version.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/little_fires_everywhere_season_2_episodesqzly1.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/e2d52f4f-06ff-4c1b-958b-b547055dd553/putulotelebivenerise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38625fe-c62b-46dc-9b6c-b2afa45ac21f/how_to_change_blades_on_husqvarna_automower.pdfIn PDF document text
    • http://kugilib.rf.gd/birthday_party_planner_checklist_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2229271c-23ca-46cc-989e-0b5a75eb3547/78252591211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b81eec-9ee4-420b-93f3-7727e55cb097/sidigamozomevaxerezus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7233e9b0-6655-45d0-b841-378c27968384/36785799597.pdfIn PDF document text
    • http://zikefibuji.rf.gd/how_much_annual_leave_do_you_get_in_the_nhs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167d9671-2d04-419a-b2e8-815119f80079/stephen_king_the_stand_2020_cameo.pdfIn PDF document text
    • http://xumutopefar.rf.gd/7773764485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5653d0-7764-46df-96bd-a836ed8e7d74/nikon_p520_manual_focus.pdfIn PDF document text
    • http://jogulele.epizy.com/pilamodap.pdfIn PDF document text
    • http://musotosas.rf.gd/what_is_the_formula_for_interest_compounded_semiannually.pdfIn PDF document text
    • http://bawavejukedosuv.epizy.com/applied_photographic_optics.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 5828 bytes
SHA-256: b227d1f2df1eea670f9e08bb864b8d54b7fb7e16e7001beb0c1e790d27bff655
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 11024 bytes
SHA-256: fbe43baa1950992d37c7fd5410138d5b6ac1eb757bcce902fac45f23a6c1fbeb

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