Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aee0f7c5a2d239f…

MALICIOUS

PDF

78.7 KB Created: 2021-05-08 12:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 48f8f6542a6c581bd78305f04bbf78ae SHA-1: 05a18daba127a414003df46ed65ee66c7496f494 SHA-256: 2aee0f7c5a2d239f6cbd154c9dc66ed015e5cff6d9906592f99a66ccaf892986
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's purpose is to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=att+uverse+remote+will+not+turn+off+tv PDF link annotation
    • http://kostlike.site/amor_de_inviernon9was.pdfIn PDF document text
    • http://jetanevuv.iblogger.org/99396044144.pdfIn PDF document text
    • http://philonio.online/53423818624bq6zg.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/sulevevijuronibivuzipanen.pdfIn PDF document text
    • http://dkshlyap.ru/858044190762jehk.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/nunividi.pdfIn PDF document text
    • http://gk-kuban.ru/ranepekavamon99fiz.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/bc89baa6-78a5-4730-a972-55d00a971dda/97314574316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb1f92c-59e6-47d6-99cc-2ca3de5eb8da/7536464315.pdfIn PDF document text
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_71f9badfedfd4a7cad481bae5e62d869.pdf?index=trueIn PDF document text
    • https://13dbc848-c95e-4197-a439-3ae2050b6ee2.filesusr.com/ugd/46bbe5_37f7b69154384826b0f6cbc16235332a.pdf?index=trueIn PDF document text
    • http://badubitoj.epizy.com/group_1_question_paper_2019_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a690b61-748d-416c-9d49-895e06b0dd86/what_is_chemical_change_and_physical_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba04ba6d-dad2-4ba1-93c0-a14de9e0135a/fixogerowanitet.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/zawaxexuviburajuwapesono.pdfIn PDF document text
    • http://getakufo.epizy.com/wozamu.pdfIn PDF document text
    • https://6f29901e-f5c9-4775-879c-97b2de5c8d5b.filesusr.com/ugd/0bf195_4d7ceedda2de4b278e4c70c37fda8b39.pdf?index=trueIn PDF document text
    • http://sedijinuv.epizy.com/nelasux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b70c7b-1a9a-48cb-bc91-096d6cbf6248/speed_queen_commercial_washing_machines_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111a0b4b-204f-477b-9408-15330004b11f/rowenta_clothes_steamer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e02ba-b397-464c-abcc-725011ad97e9/learn_hindi_grammar_through_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685b8320-937c-44ca-a8d0-0f2c33b62292/99651918194.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_90a4e492a35340779d19e34830cef88f.pdf?index=trueIn PDF document text
    • http://wawukekaxemiju.epizy.com/avatar_aang_wallpaper_hd_android.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_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 4844 bytes
SHA-256: 6eaf87ee2314d2cb409f7fd4b271dd87b2158dbfb7cb8cf0324a848b80429146
font_01_sfnt_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 11496 bytes
SHA-256: 7d0dcc6b810f7231d1153b52a9a991ccd3b906e75a5474923c695e23e853004f