Malicious PDF — malware analysis report

Static analysis result for SHA-256 95219929dcae48d0…

MALICIOUS

PDF

77.8 KB Created: 2021-02-22 05:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e7bde839ab66083d0b1f20b9d24ab337 SHA-1: 2dfcfdf43a63520c8584a28afb22964acd0a3d3d SHA-256: 95219929dcae48d0b9e2de69ff81b44498c71a33a54436cbdc5cb6455e1f5eb2
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating suspicious links and a link farm hosted on disposable domains. Specifically, the 'PDF_SUSPICIOUS_LINK_LURE' heuristic highlights invisible links pointing to domains like 'lnstagram-support.live', suggesting a phishing attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further indicates a pattern of using numerous links on disposable hosting to potentially distribute malware or conduct phishing. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://crophysi.ru/wix?keyword=bill+gates+favorite+websites PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407733/normal_600274989fe4f.pdfIn PDF document text
    • http://luchdobro.site/jotujumazadezuwenoliktmqu.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/35Cc4c8/lords_watch_tower_defense_rpg_wiki.pdfIn PDF document text
    • http://lnstagram-support.live/merry_christmas_song_piano_sheetxj67j.pdfIn PDF document text
    • http://begezuwoxinum.iblogger.org/nasm_assembler_for_windows_10.pdfIn PDF document text
    • http://notdull-eng.online/moral_attributes_of_godnzzw8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_6027ca3eae413.pdfIn PDF document text
    • https://ladubikoniku.weebly.com/uploads/1/3/0/9/130969526/wameb-kejetowupapebak-mewopofepavafo-didus.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/dmTCTHG/fitatutumezif.pdfIn PDF document text
    • https://xaxazusilu.weebly.com/uploads/1/3/4/7/134757455/mupuki.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/chgieej/kanemuduposafas.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/hejil1n/ice_cream_colouring_pictures_to_print.pdfIn PDF document text
    • https://poxejiwexoji.weebly.com/uploads/1/3/4/6/134639112/jusakemesoke_bebulazijotu.pdfIn PDF document text
    • http://vclean-sale.shop/jemolisimixitoredarajtl3db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5fd63a343d63b.pdfIn PDF document text
    • http://zakababonedip.iblogger.org/free_captain_sim_boeing_737-_200.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://masesererevitug.epizy.com/61630219973.pdfIn PDF document text
    • http://wisokokeg.epizy.com/xunaxufidatikatubon.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/gvp_module_v_rev_2_template.pdfIn PDF document text
    • http://ruzovufu.epizy.com/96979313937.pdfIn PDF document text
    • http://xagazusapikim.epizy.com/fupekogikubarokine.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_off0000f388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 5276 bytes
SHA-256: 529a2aaadffd836b0f92fce8bb790b262e2e55a78d5421c846ee792d7838d96d
font_01_sfnt_off000105ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 10644 bytes
SHA-256: 8bded2a98cc35945b265d962dcfae8f6dd1137e972051eef925febb4a3350dac

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