Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8aa541eaf83d50c…

MALICIOUS

PDF

73.0 KB Created: 2021-03-15 00:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3745881fcfe5cd2e1d27d96b8eeb6ec7 SHA-1: b2dbb0efd04f1815c784fdae720eeb6f4054c1c7 SHA-256: e8aa541eaf83d50cb7d6e16865a8c74b5dc247ada7f6beda89e858453805a38c
174 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it acts as a link farm on disposable hosting, with multiple embedded URLs pointing to potentially malicious content. The presence of 'invoice or payment language' combined with 'password-protected archive handoff' indicators suggests a phishing or social engineering lure designed to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/wix?keyword=mew+ichigo+cosplay PDF link annotation
    • http://mon-compte-cmb.best/41363738615fftej.pdfIn PDF document text
    • http://yarrebitteh.online/64346105484flxus.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/djniYTB/story_knights_of_the_old_republic.pdfIn PDF document text
    • http://svoytrylend.xyz/kenibakrfvbi.pdfIn PDF document text
    • http://itnegozio.info/vakowarodimukixegirupojaece11.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/bgftDjg/63069807055.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/9iidisf/vowabilutugezagevenexo.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/yQjeGel/school_driving_3d_apk.pdfIn PDF document text
    • http://wugafis.66ghz.com/android_studio_emulator_set_location.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_563e0891be014b0092b06d63b1cf4f40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupoti/24563824482.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_823f5570afec41eeb44d869dafe01524.pdf?index=trueIn PDF document text
    • http://zitoxilafeguxu.rf.gd/what_is_a_good_thesis_statement_for_cyberbullying.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/jezaxosi.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_013c6f56d1c0462981b8d1d505525546.pdf?index=trueIn PDF document text
    • http://woxomog.rf.gd/kunafobefupi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/68210628076.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/mcdonalds_job_application_2018.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_093cde7089ac4d33b5c522c8c98ac82b.pdf?index=trueIn PDF document text
    • http://vifowas.epizy.com/green_building_design_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/42958145141.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_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 5296 bytes
SHA-256: 3c8f4570131441adfaea60c5c16bbbe79a5f242eee14e1bf8edba741a9811c5d
font_01_sfnt_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 11868 bytes
SHA-256: 4f592060aaf53b3dde920d744ac55517693ea57f1b82de631a1b1dfc4c3e0fbf

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