Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef60ebfb9f91c0c7…

MALICIOUS

PDF

74.5 KB Created: 2021-04-03 14:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ebe7c53232f1566f25c7bc52555632bb SHA-1: 336f791b42924d7e164c6244c486284f8f76c55e SHA-256: ef60ebfb9f91c0c7b623633fc74e13df9e5810b80e6eb2d7f99f5019d00f62d2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://vilenefex.ru/wix?keyword=wood+county+register+of+deeds PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4528876/normal_6028145c006da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_5fe810242576d.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_60543fa4ef39d.pdfIn PDF document text
    • http://lofitner.buzz/energizer_battery_charger_light_flashing_redd227l.pdfIn PDF document text
    • http://help-ruleviolation.com/bengali_full_movie_site_nametu37y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5fdbfcbbdc561.pdfIn PDF document text
    • http://pazobano.iblogger.org/how_long_does_it_take_to_process_form_i_102.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/12311687399.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/13334c56-4455-4a14-a725-fbe1cb4a078a/does_samsung_a10_have_good_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a1d272-ac36-4212-af86-3c0f971b5c4c/7467324639.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/damumewinimutiwixogixetaz.pdfIn PDF document text
    • http://wosunitiguzivef.epizy.com/matudavevuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebe6ff3-e9c4-4424-a8bd-fe896a9ce1ae/macbeth_modern_english.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/sedewewotox.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/install_adobe_premiere_pro_gratis.pdfIn PDF document text
    • http://pozimefenud.epizy.com/google_dictionary_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0a28c5-4dd6-4d2f-beef-23957933da1f/cheat_codes_for_diablo_3_reaper_of_souls_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/93520546830.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/58483824731.pdfIn PDF document text
    • http://gezojetisab.epizy.com/8529449230.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_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 5060 bytes
SHA-256: 86dbfe98139691be93ac6ac102bacbbed1ceb45bd536fb6c28994f01e6a688f7
font_01_sfnt_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 10980 bytes
SHA-256: 34735beeec9b32d85bdee4fe2b62c61b9f68b930f0579b380b22080a7024159f

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