Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba876196d47f7c63…

MALICIOUS

PDF

83.9 KB Created: 2021-03-25 05:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: affb6502af7218faa4b35dbf93fe7225 SHA-1: 72f9a4aba7e5252ff6f346cf346aaac4f49c925d SHA-256: ba876196d47f7c63c606d68de02b47d775da774287fd6be56d1310a5089564a1
186 Risk Score

Malware Insights

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

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 0.9996

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://dugedepap.ru/123?utm_term=filmora+full+crack+mac PDF link annotation
    • http://jelesanu.iblogger.org/49895263931.pdfIn PDF document text
    • http://uggi-ugg.com/91595240705ju57n.pdfIn PDF document text
    • http://cardioactiveuficiale.site/how_to_take_apart_kenmore_dryer_model_110x9o8g.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/sujobipefixavag.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/4ea8f7c7.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/ibjh8he/fogape.pdfIn PDF document text
    • https://cdn.sqhk.co/bataseset/anbjigd/national_geographic_channel_on_spectrum_tampa.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/kggEMha/vuwuwanemosu.pdfIn PDF document text
    • https://miraxinarenipu.weebly.com/uploads/1/3/5/9/135963033/jovegeluxef_puruwo_sabijafisajekif.pdfIn PDF document text
    • https://cdn.sqhk.co/kototokim/jagiib8/fizoret.pdfIn PDF document text
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/139088.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/a138876fc150d7c.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/20f86d25-a9de-44bd-8365-c1d4fdef93db/68842016539.pdfIn PDF document text
    • http://mikipifovusi.epizy.com/a_christmas_song_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731904a8-9bfa-423f-837e-1a4543dee235/how_to_use_a_single_use_keurig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7151c734-4cf2-4a58-a9b2-9d4af7c9fe54/dinani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b03cb2-7a52-4c57-b14a-bf3fc634f795/tigeloraxapikexomul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9ed8a1-a547-4866-ad40-2d8aa834c67b/26314098599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944a20d2-0c79-41db-954d-9f3f861a5dc0/how_do_i_connect_my_ipad_to_my_printer_via_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a3ab2e-76b4-48d3-beed-d2cf7e3bfb26/vivexojam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d4cbec-cbc1-4585-99c0-e6fc33f5afb8/bolakozudolewunivoga.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_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 4444 bytes
SHA-256: 6c3a4cd8eaabe7827b44b5347526d9eee3320bb9bb9423d910e8d0d38d0cfbb0
font_01_sfnt_off00010cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB9 11816 bytes
SHA-256: 0e859e4fd828a6087f4d5a940b145ffa67962bd7e6d202ba5b74c567fd8bf833
font_02_sfnt_off00013491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13491 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2