Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6027268a0013ec…

MALICIOUS

PDF

72.1 KB Created: 2021-02-16 01:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5ea015b63109432540c2f5ede962ba53 SHA-1: c2fd909d1b9e1e3ada01d27dcd1e9e4c191b9848 SHA-256: 5e6027268a0013ec11bfca286ac74d666ea3cf0744969b57508a432fcf0e0759
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains heuristics indicating it is a link farm on disposable hosting and uses a remote-support tool lure. The ML classifier strongly suggests maliciousness. While no scripts were extracted, the presence of external URIs and the nature of the lure point towards a phishing or social engineering attack, likely aiming to trick the user into downloading and executing a secondary payload.

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://baarspo.ru/strik?utm_term=is+moroccan+oil+good+for+acne PDF link annotation
    • http://pujesuwidiw.22web.org/amenitee_ultimate_template_tool.pdfIn PDF document text
    • https://zoriliwusitilo.weebly.com/uploads/1/3/4/4/134479822/vidutitexujojipuwot.pdfIn PDF document text
    • http://uspex22.online/63264276649k3wbb.pdfIn PDF document text
    • http://6gusevshop.website/pinotevixuyfxnc.pdfIn PDF document text
    • http://vodoroding.info/sinasmr0cf.pdfIn PDF document text
    • http://regsen.website/40554444723wm6sq.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/5a8697.pdfIn PDF document text
    • http://kittyplay.online/movie_counter_hd_movie_freevu7yw.pdfIn PDF document text
    • http://idealslimitalia-official.site/chicken_invaders_6_free_for_pc2w49t.pdfIn PDF document text
    • http://servicesforsupport.com/161382650138wql9.pdfIn PDF document text
    • http://aicberg.net/pirates_of_caribbean_5_link3g3ej.pdfIn PDF document text
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/sexumozoxapa.pdfIn PDF document text
    • https://zetozegazironik.weebly.com/uploads/1/3/2/6/132696155/semuwevovadikekifixi.pdfIn PDF document text
    • http://good-production11.site/intrapartum_care_nice_clinical_guideline_55467hp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pawuvunof.epizy.com/62994644807.pdfIn PDF document text
    • http://tizepadeda.rf.gd/identifying_literary_devices_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/android_emulator_for_pc_software.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/jesepirurefinimezux.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/lomidukexosojos.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_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 5276 bytes
SHA-256: 902aa316082e40976cb84dc4801ba89773ff9c9fd8d219cae3e21edddb7c16f0
font_01_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 9828 bytes
SHA-256: 7196698bd8fe6160dba4e4b21483d103cccea20200b5264429d98bcc04f4446d

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