Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf84387ae1fc038c…

MALICIOUS

PDF

155.3 KB Created: 2021-03-13 17:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5044c2f66ecc200d7b31c1da93d378f8 SHA-1: 31ed563fb8259ee99ea4e8f242479bca06c8e068 SHA-256: cf84387ae1fc038cd4f59a388f00c3b23a4a9593fb9bc63c6b5ce91193bb1c2d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=frozen+jr+script+part+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6018ea9248631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_6018d9163255b.pdfIn PDF document text
    • http://extrameets.fun/44572229029o25gd.pdfIn PDF document text
    • http://triple-doska3.club/zumoballbaum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382779/normal_5ffb51fa96656.pdfIn PDF document text
    • http://nigasheff.xyz/mexican_water_glass_musicj37kc.pdfIn PDF document text
    • http://heartcenteredequestrian.com/super_mario_brothers_2_wii_gamea7vy5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_603e538696658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_603b8cd937f83.pdfIn PDF document text
    • http://premiumpornclips.com/chenard_chess_freeqpsfg.pdfIn PDF document text
    • http://funuvumolifedaj.iblogger.org/wagekodi.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/vuwudonupisidokjeyva.pdfIn PDF document text
    • http://cmbespaceclient.xyz/best_android_action_adventure_games_2018gcggw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c30755-8dd1-4856-9e91-1b4cc7394f9a/overview_of_osi_reference_model_and_tcp_ip_protocol_suite.pdfIn PDF document text
    • http://gebutetivifupa.epizy.com/swords_and_sandals_1_skill_points_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016df6ca-bde2-4e1b-996c-84684df685d3/romeo_and_juliet_1996_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d9f32a-4678-4e6b-85a0-e9c18ed5373d/how_to_update_s7_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b0cdad-9bd9-4645-83f2-6a9ab1226e9d/michael_talbot_the_holographic_universe_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2aa9e6-4d4d-4858-a4a7-b16cc10d265a/41792626880.pdfIn PDF document text
    • http://muparokaxewidad.rf.gd/rebinagetewuxusovodufom.pdfIn PDF document text
    • http://muwaziri.epizy.com/aia_hk_dental_claim_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760cd08d-565d-4d18-9ca1-7de7c6ccc029/kulidobibizifuvikemutu.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_off00022990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22990 5028 bytes
SHA-256: 8d5b84f1cdc0e39550f1fff5bfe39db05735fa5cdba09123950e27e532a0cd16
font_01_sfnt_off00023acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23ACC 10764 bytes
SHA-256: 1e7731a8ee56889d52e1a138547049977a63e4d7dee017c4e772e4fee1d93a2b

Open this report in the interactive analyzer, or submit your own file for analysis.