Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e65ace130babce…

MALICIOUS

PDF

55.3 KB Created: 2020-10-21 12:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 127e6ac58a65c57adab395766573c6a5 SHA-1: 1cf4ce31ce3c9856d973209f9752ada701fb74d5 SHA-256: d7e65ace130babce3a9688e5b5b73511c10d7341ef982a252033cf7765244918
184 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which point to disposable hosting services and redirector infrastructure. The ML classifier and critical heuristics strongly indicate malicious intent, likely for link farming or redirecting users to malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/123?keyword=g%25C3%25A9n%25C3%25A9ralit%25C3%25A9s+sur+les+eaux+souterraines+pdf In PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/kokuguj.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/5901192.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/zotego.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/sugexi.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/xidijegogo-gukusati.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/3898644.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/gudag.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/rotazojegisuv_bujova_runanukule_pamizixizepip.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/xorimulitagu-favafevitivopa-vuwajon.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/7ee9ae9c-cc99-4295-9aaf-e763b9f3288d/sadefusegojim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d7b4d5-afc6-4620-ad4f-d30a9f85dc7a/you_feel_vibrations_from_deep_below_terraria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7800/3109/files/biriguvunive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/jajabokivugikelebatuxezul.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/55120113484.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/vexabazesa.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/beloved_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/wokil.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_off00008679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 5160 bytes
SHA-256: a1c3d50f171bff471ff39595c3f7b177d7137a109aff7852c5cd72e78b60c524
font_01_sfnt_off000097d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D2 12392 bytes
SHA-256: 6e5f14516b872661fe5f5dd2f919b664107195d55241f4229bfa60341358b6b2
font_02_sfnt_off0000bf48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF48 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3