Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a019edc288d9c7…

MALICIOUS

PDF

79.8 KB Created: 2021-04-06 00:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d0b08bc295ab8ff47d85b3c872cd9f72 SHA-1: 1b266a893c0a37ec4a0c81150069806ce40f8dcc SHA-256: 17a019edc288d9c752439814fa557ef1bbad6c18ede71361f473f90cde76fe57
134 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. It uses an invoice-themed lure. 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 0.9998

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 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://jacksth.ru/wix?keyword=bank+debit+memorandum+for+service+charge PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5fed10aacd651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463791/normal_6002b7855e967.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/5c639dfa7a67.pdfIn PDF document text
    • https://gibexiwufanoti.weebly.com/uploads/1/3/6/0/136099712/raned_benafa.pdfIn PDF document text
    • https://sebuvijanamo.weebly.com/uploads/1/3/4/8/134856810/3495693.pdfIn PDF document text
    • http://xixodajikurug.22web.org/seiko_mens_ssc021_solar_diver_chronograph_watch.pdfIn PDF document text
    • http://heleogose.online/48618124478z8ysk.pdfIn PDF document text
    • http://fegalaro.iblogger.org/bulandi_song_video.pdfIn PDF document text
    • http://pixxel.life/born_a_crime_book_quotesnsztw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446263/normal_5fed64a3eaf88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pububebojivoru.epizy.com/dodge_nv4500_4x4_rebuild_kit.pdfIn PDF document text
    • http://dupojuve.epizy.com/52113771096.pdfIn PDF document text
    • http://serinuzosazojup.epizy.com/yeastar_s100_configuration_guide.pdfIn PDF document text
    • http://gazavitiji.epizy.com/smc_pneumatic_cylinder_catalog.pdfIn PDF document text
    • http://vunatavinede.epizy.com/67420924993.pdfIn PDF document text
    • http://tararefegegelel.rf.gd/pavafomu.pdfIn PDF document text
    • https://f3e0ee59-b309-4736-aefa-1db4f942b0be.filesusr.com/ugd/e87662_ce4ff61f97574dea8d7242f7f509da36.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_011b0cfcda954e288d6298fe306ad02b.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_9db175a6eba54171ada668a9c81ad3e4.pdf?index=trueIn PDF document text
    • http://pogosib.epizy.com/vocabulary_games_and_activities_a2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 5596 bytes
SHA-256: 61a05ee48874d3a6a7544e356bfa2ea92351d5fdd348171a62ada88ec318a859
font_01_sfnt_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 10820 bytes
SHA-256: 1a6b394692939cf82c835ce7bc7821196ab1188fd4e704852c6c294dd9aa1552
font_02_sfnt_off000123f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F4 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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