Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ebd7df17671fdf…

MALICIOUS

PDF

140.7 KB Created: 2021-06-09 15:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f8d8952e225119062699213fcc2b2371 SHA-1: e00d4caa49a64daae16778c3af659657e0c60bed SHA-256: a1ebd7df17671fdf19f983020abc1161aa3b2eeb779f1c2e45de96d508fa5ffb
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The primary URL, 'https://inwebjor.ru/pbw?utm_term=watch+spider+man+homecoming+online+123', is presented as a lure to watch a movie online, a common tactic for phishing or scam operations. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://inwebjor.ru/pbw?utm_term=watch+spider+man+homecoming+online+123 PDF link annotation
    • https://zinelenugep.weebly.com/uploads/1/3/1/6/131636957/kuzepokusikalixujiw.pdfIn PDF document text
    • https://sovezoku.weebly.com/uploads/1/3/4/7/134731827/974af9ceb595583.pdfIn PDF document text
    • https://gixopujo.weebly.com/uploads/1/3/0/7/130775076/tojufagepi_jowuxogaro_fikeredazop.pdfIn PDF document text
    • https://rujedupexiveviz.weebly.com/uploads/1/3/4/8/134874221/jekikumulowu-zimirukux-zixusefugujino-fesotex.pdfIn PDF document text
    • https://sukigemanewa.weebly.com/uploads/1/3/2/6/132681928/nalifikuwulasam.pdfIn PDF document text
    • https://sutikarojujo.weebly.com/uploads/1/3/4/3/134343437/gimojafemup.pdfIn PDF document text
    • https://fovinerorowabas.weebly.com/uploads/1/3/2/6/132682717/fomawisubimule-wuzenegujibop-vukumularo-vuketadag.pdfIn PDF document text
    • https://bewosugug.weebly.com/uploads/1/3/0/8/130814774/211032.pdfIn PDF document text
    • https://suxuwimuwudex.weebly.com/uploads/1/3/4/6/134641155/3864143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144595716/74929636671.pdfIn PDF document text
    • http://pukagij.pbworks.com/f/lazudujazonopipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c9001c-45b5-4853-8693-9630a43594b1/what_is_the_most_significant_development_in_the_history_of_western_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb136e8-1eba-4fa4-9811-ba284a03d7ef/insurance_customer_service_representative_job_description_resume.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/w/file/fetch/144426621/tinubajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078394b1-e8ec-4a5a-ac61-abccf41e31ba/12074548752.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144426936/true_devotion_to_mary_with_preparation_for_total_consecration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0a0691-9dee-435c-b86f-edb626d28cba/bissell_carpet_cleaner_spare_parts_australia.pdfIn PDF document text
    • http://mazibudikor.pbworks.com/w/file/fetch/144618561/what_font_does_bank_of_america_use_on_their_bank_statements.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144810300/how_long_does_it_take_to_become_a_podiatric_surgeon.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001baf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAF2 5848 bytes
SHA-256: 9e1c368e1722e169c58e19533ff2758359bc8d05f7f35f597897996ee8b6b495
font_01_sfnt_off0001ceb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEB7 5836 bytes
SHA-256: d39f23a48e90df41e40427c5de167a173c1abd14e4f42860ef488d73ce9175fb
font_02_sfnt_off0001dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD6E 1716 bytes
SHA-256: c0e39f44321a474cc328806e737293db5bfd2873d0430c567f64257ef24eb06f
font_03_sfnt_off0001e5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5F9 10740 bytes
SHA-256: f574c9f01837788e0acd7c0e560aaf5ac21af47c2c94ec27efdf22f9188c2b1c
font_04_sfnt_off00020a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A31 16984 bytes
SHA-256: b0c63cd50fb3e8dc5406f6450d71989507c33b5b4e213aa4c285e882a58fab34