Malicious PDF — malware analysis report

Static analysis result for SHA-256 119994cbb8961b0c…

MALICIOUS

PDF

88.5 KB Created: 2021-05-20 05:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9ad64843be71e370474803b0585e75ce SHA-1: 2131071493ee9a87b46fad109ceca0440ab86038 SHA-256: 119994cbb8961b0c6c1fa1183aad0eb878bd5a59408dde127d03e01407df8ffd
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or scam document, with a significant number of external links designed to farm SEO traffic. The primary malicious URL identified is 'https://midufefew.ru/strik?utm_term=beneficios+do+oleo+essencial+lavanda', which is likely used to deliver a secondary payload or redirect to a phishing site. The ML classifier and ClamAV detection strongly suggest malicious intent.

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 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.
  • 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://midufefew.ru/strik?utm_term=beneficios+do+oleo+essencial+lavanda PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367687/normal_5ff85323177fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_602b74725a02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_6031d799c26a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_6056ace4240e7.pdfIn PDF document text
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/saralavug-gigodutebum-zajan.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/gumufuduxunasof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_6054bed904cdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5ff0a3e909791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fd680ca8cdda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0c48d27a-045a-40c1-8914-38c5796b16ae/holmes_tower_fan_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ac956c-0462-4262-b9f9-140ae3aff1c8/formato_de_minuta_de_constitucion_de_empresa_eirl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249ef4b4-5517-45ae-81e9-f02f5a377704/frigidaire_12_can_portable_mini_fridge.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/49378329883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89024fde-8d4c-4464-a8e8-d95bee56faf4/how_to_hard_boiled_eggs_in_a_pressure_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/what_are_the_different_drawing_views.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3b84d7-dff3-45f4-b7ab-fdb744ad2d0b/nextbook_ares_11.6_spec.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/the_blue_book_devotional.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/incropera_principles_of_heat_and_mass_transfer_8th.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/viola_free_sheet_music_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e691b7-c5cb-4282-8987-4f3e43485b57/14219332760.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3E 4736 bytes
SHA-256: 9e2eec39652c715cb6b96e0f8012461a81bbe3086e04242decb546e57b5d5db6
font_01_sfnt_off00011e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E63 12760 bytes
SHA-256: a21c2b671de33973ab6d6c764751a7a23bb7adfff50d5350e5ff990d0b48463e
font_02_sfnt_off000144df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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