Malicious PDF — malware analysis report

Static analysis result for SHA-256 96403a45d846e695…

MALICIOUS

PDF

80.8 KB Created: 2021-04-23 20:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 48042ba1397a64ad98d18ce01789c31d SHA-1: c61b1e811c193c51f63eadecf4e3538d9d9cde9c SHA-256: 96403a45d846e69597c409a21a6b0e832df5bfe3706d9401c8ded26455ecd5c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'orthodox christianity beliefs', directing users to a malicious domain. This suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=what+are+the+beliefs+of+orthodox+christianity PDF link annotation
    • http://tixshopclub.fun/pabawumoglnw9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5fe7926230423.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/the_tempest_english.pdfIn PDF document text
    • http://lemurezagamu.iblogger.org/50417705315.pdfIn PDF document text
    • http://dsv-trening.ru/71112639512sqcwq.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/nigifabekatuvojagasedogu.pdfIn PDF document text
    • http://hdsamara.ru/39641579085serp8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501775/normal_5fc85222d19bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_6033f239e722a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_60601ea79e5f2.pdfIn PDF document text
    • http://gewebud.22web.org/abertura_de_empresa_sebrae.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/fujirofunifezodadiraf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijetebum.epizy.com/adb_shell_install_apk_command.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40afdb3-4c46-4257-9f29-9691e8aee4c1/baltimore_catechism_no_4.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/18514466425.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/vosal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f39b18b-d99a-44b3-b4e3-a393da908f35/how_do_i_become_an_eyelash_extension_specialist.pdfIn PDF document text
    • http://nonosolagosev.epizy.com/27544731121.pdfIn PDF document text
    • http://powajokex.rf.gd/titajezag.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/notaxavileruzovakimesava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd75716-0a90-4c43-99d0-475c68612df6/i_dont_have_enough_faith_to_be_an_atheist_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/adhesive_vinyl_sheets_for_cricut.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_off0000ff28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF28 5432 bytes
SHA-256: b0c9f4150b8393bce3ab5c17c8cd27f334198710668a29bd6a063b53b70bef38
font_01_sfnt_off000111b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 10332 bytes
SHA-256: 9c15b4b86dbbd8ecb7961056c837bc1dcaf8ed766c114259d7ea1bf587dea03d

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