Malicious PDF — malware analysis report

Static analysis result for SHA-256 9692a8c2ba3f0126…

MALICIOUS

PDF

102.6 KB Created: 2021-03-14 07:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f65563d9d65a02d4941412259d947db5 SHA-1: b8b68a45164b7e2a58215c6e13627b59cb0361cd SHA-256: 9692a8c2ba3f01269516655f7fd596c89d465b1e20a5142a4d2811287eafa8a2
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The primary URL, 'https://jottigo.ru/strik?utm_term=pelicula+principe+de+la+niebla', appears to be a redirector for malicious content. The document's content, though heavily obfuscated, hints at a lure related to a movie title, likely to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=pelicula+principe+de+la+niebla PDF link annotation
    • https://cdn.sqhk.co/sotisajen/hbbrjf7/79907576683.pdfIn PDF document text
    • https://buwotudotep.weebly.com/uploads/1/3/1/6/131606539/0b32d7f328da7.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/hfrTRvL/64727120803.pdfIn PDF document text
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/5601046.pdfIn PDF document text
    • https://midumusifefo.weebly.com/uploads/1/3/5/4/135401272/2b4f083778a.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/vuwivapok-pilogato.pdfIn PDF document text
    • https://xofofafe.weebly.com/uploads/1/3/1/4/131438501/fakewuzobo.pdfIn PDF document text
    • https://kewivuzakokefi.weebly.com/uploads/1/3/0/7/130775129/fidinowedun.pdfIn PDF document text
    • https://wegekasi.weebly.com/uploads/1/3/4/6/134678838/jagegaf.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/nukonunijiwube.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
    • https://uploads.strikinglycdn.com/files/c51f49b4-3ee2-47ee-b16f-8ea4df15d1d6/what_is_the_easiest_way_to_cite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9218438-b4b2-4b3e-bc23-f9694caffaf7/8003932391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d923f97-51c7-4ad6-aee7-6e7c30011e1b/what_is_sensory_language_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2058ff-26c2-4d82-85bb-cd14150c1958/xezagodudewuwejijasolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667a1a0b-bd78-4f79-92e9-69c36ec01663/92408473484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0664d221-31b5-48af-ba70-fce4cb3e997f/how_much_does_it_cost_to_have_a_dna_test_for_a_dog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ac0f09-3014-4905-95e7-1f0bb03c103d/cooks_essential_pressure_cooker_sealing_ring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73cacb2b-33d3-48b5-b6e3-c494cd306989/g_shock_ga_1100_1a1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49923e6b-732b-41c1-9778-dd987bcba6af/how_to_open_wd_my_passport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0064ec65-a1ca-4124-b5c5-26818cb38f87/ketije.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E7 5028 bytes
SHA-256: ccbc4a14547fc4dcc016eebbb0b677cbb87dd975bf49651d2cc15685b9f83c44
font_01_sfnt_off000154fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154FA 6124 bytes
SHA-256: a397c99fba0e47a5823b98702d751ffcad5d714ce329e5ad92c3da3ea2ddfcaa
font_02_sfnt_off000164e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E3 11824 bytes
SHA-256: 86432a2526cccd71aed535fd436c5b3345c6ddc745798ec86cef50f1c937a996