Malicious PDF — malware analysis report

Static analysis result for SHA-256 b954687918f61753…

MALICIOUS

PDF

78.9 KB Created: 2021-06-04 07:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e1c26d388cb159587b7e75d9ef9e0bc9 SHA-1: 04a3851831b7078e43f096c1bf4839b4322a8992 SHA-256: b954687918f61753af3332d008e30e807480d1b2808fab28ee2b5974e42520d1
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=avp+alien+vs+predator+full+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412591/normal_5fe4beb6cb36e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383149/normal_600878df4f3ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458407/normal_5fed23d4bcbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_60377f20a4ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6022e6c11737f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483083/normal_6015294ca9233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448100/normal_5ff9f888928f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_605af6c38be17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381730/normal_5fc7ce6a4269b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_601b1a9450428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5fe7e3592933f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_5fda79abc381d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527747/normal_6028ea699e315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_60157f6601da8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutoteja.pbworks.com/f/read_the_excerpt_from_the_most_dangerous_game._rainsfords_response_to_zaroff_indicates_that.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/foreign_words_used_in_english_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a4288a-7cfa-45f5-ade0-0537279b7e7b/end_of_the_world_song_2020.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/f/28007107615.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144512547/exercices_figures_de_style_comparaison_mtaphore_personnification_hyperbole.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/lumixelezetosusirajaxako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5613dfa2-43d2-4b4d-9924-3bf7f5bcd9e7/power_privilege_and_difference_sparknotes.pdfIn PDF document text
    • http://nikekuva.pbworks.com/w/file/fetch/144426627/how_do_i_file_a_new_unemployment_claim_in_oklahoma.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144413766/galudovujevibujonefi.pdfIn PDF document text
    • http://veweran.pbworks.com/w/file/fetch/144432660/how_to_beat_the_egg_drop_challenge.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_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 5236 bytes
SHA-256: c061962604e9af84df10d8659ecf8cd8c9168702dd611941ed1a27408f124160
font_01_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 11400 bytes
SHA-256: 8d2f730f5926034fc84a380180d04e982f8fef51d390eac96bd96bac8caf96b6