Malicious PDF — malware analysis report

Static analysis result for SHA-256 687afdb38c81384e…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 14:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0f77fa86e74bec3c0364d3ccaffd85c9 SHA-1: acd316d2b14935f0012a8b5091ef9477dd7fce79 SHA-256: 687afdb38c81384e28859aa07ec0fbfd5a1fa5aa41a0aba2a171ad36294b6419
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the large number of embedded URLs suggest a phishing or malware distribution campaign. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly implies an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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 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://golowaki.ru/wix?keyword=casio+dg+20+digital+midi+guitar PDF link annotation
    • https://cdn.sqhk.co/nexasolonit/joggd4f/alone_pic_boy_dp.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/dewalt_dws780_instruction_manual.pdfIn PDF document text
    • http://godezigupo.mywebcommunity.org/input_type_file_accept_only_images_and.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478137/normal_5ffa3ddabea07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365636/normal_60021b0facee9.pdfIn PDF document text
    • http://free-at.pro/how_do_i_use_my_lowrance_elite_7_tiqwo95.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/erjcjg1/wawubinewuminunipekade.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/fjjhg0z/28921831041.pdfIn PDF document text
    • http://avto-trokot.xyz/whats_on_dominos_philly_steak_pizza7820h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_6038d0abe74b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_6028f8f0a590a.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/gEXiaji/dalolisatipibipusevumaxad.pdfIn PDF document text
    • http://detonic-romania.website/24549162393m0vi1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexotorat.rf.gd/vimedevikob.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/sukiwix.pdfIn PDF document text
    • http://vobozezojip.onlinewebshop.net/anlise_de_dados_com_python_e_pandas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c6a0f0-b4dd-4d91-952a-a3965cf96dc7/faxapemojazeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1f5627-c8f4-4913-8e7c-57cb01ccbbad/what_fruits_and_vegetables_are_high_in_alkaline.pdfIn PDF document text
    • http://bifutebapeji.epizy.com/mini_cooper_brake_repair_near_me.pdfIn PDF document text
    • http://xufolat.atwebpages.com/butterball_turkey_fryer_xl_cooking_times.pdfIn PDF document text
    • http://rajavipol.rf.gd/berenstain_bears_tv_show_theme_song.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_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 5324 bytes
SHA-256: b9a6216fb3510cb304a43c5eaec9e90b9743174416ac4dee52458aba4db91844
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 11308 bytes
SHA-256: d02e9b910107b562114ff50f251a7381ed8262c7db61b8387e52efaefc477fc0

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