Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ccece52f64c449…

MALICIOUS

PDF

77.2 KB Created: 2021-03-09 00:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3e5051884c1d3b5a73f895a692a1664 SHA-1: 3021c133b568a0f887f45d3db685d1b3fa3341d7 SHA-256: 05ccece52f64c4490786e78526c0a1826ae39f994534b528fd4b7da15aefaf6f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/award?keyword=cambridge+key+english+test+2+listening+pdf PDF link annotation
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/jatadevirulivo.pdfIn PDF document text
    • https://fujelaxu.weebly.com/uploads/1/3/4/7/134704358/33ee3ec9a.pdfIn PDF document text
    • https://cdn.sqhk.co/bareziwo/aifohgt/92700140094.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/RigsjiH/61244482934.pdfIn PDF document text
    • https://mokowevabib.weebly.com/uploads/1/3/0/7/130739664/1d733dbf.pdfIn PDF document text
    • http://fumakonaforug.iblogger.org/agatha_christie_miss_marple_movies_list.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/mUggg8C/27463649061.pdfIn PDF document text
    • http://ribozigokadime.iblogger.org/liwebipuzonaji.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/buku_akselerasi_fisika_kelas_11.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/ihfjjf8/remote_project_manager_jobs_charlotte_nc.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/7db2d9be-c435-46a4-befd-e656def14677/why_afraid_of_death.pdfIn PDF document text
    • http://fusuzuveraku.epizy.com/formation_carreleur_cours_du_soir_bruxelles.pdfIn PDF document text
    • http://tubasip.epizy.com/revista_natura_outubro_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886964ec-f78a-4335-838a-a3c8c867edc0/free_printable_intermediate_christmas_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf88e2aa-aab5-4ab6-bd36-e111262b6c16/vaxumijer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86d23ca-41f5-43b0-9686-4d8e5a2b2a00/suteserovuvusavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675165a1-720d-4a5b-a424-1cd397535b10/tale_of_peter_rabbit_movie_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0122f72b-5dea-461d-9a90-4d9662f1ee96/budijomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77f105b-13e1-42ee-8e6a-7e15963a3a83/13098370953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd0801a-3900-4a42-9dbe-33bb1500d65d/how_to_fix_outdoor_faucet_handle_leak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c09b3c-752c-47d0-9108-188b90aa7dad/zomabazabewegufuku.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_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 5796 bytes
SHA-256: dcb2edead0c8d17ca06de7dcabde92c6f81509c648629ab200d4feefcb0e979e
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 10508 bytes
SHA-256: 6585d52140892defbc93b5bd4a6de7d1c4ba8b3d8a56f07b65e9406beb6131e0

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