Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e17d3446c45548…

MALICIOUS

PDF

101.1 KB Created: 2021-04-01 21:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d4067d7ff530179fc420c70d8b54d9fa SHA-1: f5100e65e4015f95815f4b8fc7bfe755f1e27cea SHA-256: 00e17d3446c45548b5b9b3d2c782eb971ff7c39c5395269480d53298ab5391c3
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to obscure the ultimate destination. The document body, though heavily obfuscated, contains metadata related to PDF generation, and the presence of external URIs strongly implies an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/123?utm_term=emerging+approaches+to+leadership+pdf PDF link annotation
    • http://nuwazomesesanok.mygamesonline.org/95559032371.pdfIn PDF document text
    • http://detozube.scienceontheweb.net/how_do_you_add_fractions_with_whole_numbers_and_different_denominators.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/31378047519.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/budatebosunuz.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/surface_irrigation_system_design.pdfIn PDF document text
    • http://jonapesi.22web.org/william_shakespeare_poem_sonnet_130.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitixojofesozi.rf.gd/lazawikaratujujab.pdfIn PDF document text
    • http://zoluwupaxefiv.rf.gd/why_did_my_digital_thermostat_go_blank.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_bbc59d4cad7e4c2c9505dfd96c188934.pdf?index=trueIn PDF document text
    • http://sudipefenivu.rf.gd/engagement_survey_action_plan_template.pdfIn PDF document text
    • http://fofeparulofiz.rf.gd/wejusatanokivusafi.pdfIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_ebeaaa2297e247e39894535dbe5bbc20.pdf?index=trueIn PDF document text
    • http://kovefevejafuk.epizy.com/it_is_called_the_age_of_reason_renaissance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6aa9c7-028f-4069-8db1-5a5fbed8f335/golden_son_quotes.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_757daa5c8dc043f896bb6eca5d0412b8.pdf?index=trueIn PDF document text
    • http://wiwekire.epizy.com/the_hurricane_heist_parent_guide.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/4108170755.pdfIn PDF document text
    • http://dakinopelijanup.rf.gd/87158681676.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/80631687701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c8e310-25ed-4220-af5e-cc0f6b88e2c5/77678610366.pdfIn PDF document text
    • http://tojozojorezew.epizy.com/guxotixerobamunegilavev.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_10f5fe7ac7f74ec3912cf1255696dcb8.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_983860bd72d74d808f150a111fc2ac10.pdf?index=trueIn PDF document text
    • http://letituxis.epizy.com/92457689613.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_off00014cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD6 5524 bytes
SHA-256: 6d2ed6768253cc1ed360e11531a92174b51dd1876da0944d25056f2454147bf6
font_01_sfnt_off00015f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F79 11144 bytes
SHA-256: a67c13c95d0b5c019a06b3424b0d39799e45a1375c7c834f5a184f63b02681d4

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