Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fced0928b76f63f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-14 05:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 691629a2c2d7cc93b60b8d3d935b8b6f SHA-1: b5bda0be9648e6b0da1a65ff6e313734a6c0d4f8 SHA-256: 4fced0928b76f63f590bdc9bd1aba969c9919bcd193c8f34781e997ed146ed75
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wb?keyword=how%20to%20improve%20listening%20skills%20activities PDF link annotation
    • https://cdn.sqhk.co/mufipofunup/Wjeihig/amazon_kindle_paperwhite_32gb_review.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/how_to_use_a_scosche_wireless_car_charger.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/zomew.pdfIn PDF document text
    • https://cdn.sqhk.co/supetuzitepi/SHFMfAc/ben_10_alien_race_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/Emje843/41571755744.pdfIn PDF document text
    • http://biomaniks.website/tank_trouble_unblocked_games_at_schoe71qg.pdfIn PDF document text
    • https://cdn.sqhk.co/wemerofada/gfaogcD/vewozujatekexejojim.pdfIn PDF document text
    • http://vizit.store/jekafibalejasazijogiganilmyorh.pdfIn PDF document text
    • http://tersq.fun/guia_autometrica_enero_2020c4n9s.pdfIn PDF document text
    • http://jetavof.sportsontheweb.net/muvexexilajafipiwejewezu.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/50126492828eibo8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_60274b6c64dd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465941/normal_60035ad4efb3d.pdfIn PDF document text
    • http://kungfumalibu.com/vanilla_buttermilk_sheet_cake_recipeedhsv.pdfIn PDF document text
    • http://baranaydin.org/mr._coffee_iced_coffee_maker_with_reusable_tumbler_and_coffee_filter_near_mejxd0r.pdfIn PDF document text
    • http://promooffer.site/55456103334lv3pk.pdfIn PDF document text
    • http://b2b-servis.ru/pobegofudxjc7e.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/3a2ad419-073a-416e-8cbe-5fb3b270a3f1/wajele.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/cedaw_and_bangladesh.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/gebirirugaxojupevujavidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fc9927-20a3-4d1f-87e2-4cd36e95c6b3/35640586732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99079153-7f89-46de-a630-2925536732be/57984989442.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_off0000ea44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 5428 bytes
SHA-256: 6ed7383ddc8149323ff101ee3420de1aa10b1aa36ba75e75528916798fa92730
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 10608 bytes
SHA-256: f2133fae5d9048fae60173d35d7b6addf3885ec7f46a2e986bfba285aa379398

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