Malicious PDF — malware analysis report

Static analysis result for SHA-256 d723c634ca45382f…

MALICIOUS

PDF

40.7 KB Created: 2020-09-30 14:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da3218846beb4b12c719e0ec6447264d SHA-1: b17457734a624af6e8a895082c913d00d48fe1a1 SHA-256: d723c634ca45382fcbf0bd81fab0b73b99b63256468dc1d1ffc4fb68dbbbbd0d
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=nios+assignment+front+page+image+pdf In PDF document text
    • http://finoguv.oumedicalimaging.com/uploads/1/3/0/9/130969858/67734bec924.pdfIn PDF document text
    • http://rivelowa.regenbiopharmainc.com/uploads/1/3/1/3/131379362/2ad7216225.pdfIn PDF document text
    • http://files.mp4hymn.net/uploads/1/3/1/6/131606291/wawexirefa-mixijigiva.pdfIn PDF document text
    • http://files.triplea-solutions.com/uploads/1/3/1/4/131406348/xusilawa-rekodubuxuzo-gigebediraniso-volare.pdfIn PDF document text
    • http://files.originalfloors.net/uploads/1/3/1/6/131637108/f32ea450e196.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/76285418426.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/7114008047.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/67599007280.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/jawinifenemibogivagak.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/25500564209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2821/5968/files/ayurvedic_cooking_for_self_healing_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/rurisojazejoxitavilevasap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/3396/7003/files/play_store_apk_8._3_41.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/40962750353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/how_to_install_windows_98_on_virtualbox.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_off00006063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 5300 bytes
SHA-256: 597f9b813ca29412a315639a1a170b95b1388a0437d6aca3c51ea7a6ec20ef3e
font_01_sfnt_off0000725c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 10364 bytes
SHA-256: f1bd74975e11b01bffe408abba155eac90421106d025301b9724074ae3008f8b

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