Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb00d1625f098165…

MALICIOUS

PDF

100.1 KB Created: 2021-05-25 14:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5df8bc1d8fe39124b541716bd9cdc6ce SHA-1: 25d12b98d7c420029a05d4aced42f6e613fd396d SHA-256: fb00d1625f098165fa7128b12633d3fdc5eba66c6e5a253af2dd6dada2596581
126 Risk Score

Malware Insights

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

The PDF contains a deceptive title suggesting a movie download, which is a common social engineering tactic. It embeds numerous external links, forming a link farm, with one prominent URL leading to a potentially malicious site. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://vilenefex.ru/strik?utm_term=evan+almighty+full+movie+dual+audio PDF link annotation
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/piwineziboma.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/kivufatela.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/buritekosakile_roweranuzal_wexeberakili.pdfIn PDF document text
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/kegupubifuv.pdfIn PDF document text
    • https://pobogovowot.weebly.com/uploads/1/3/5/3/135323888/zewezikige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fee7d8f862cb.pdfIn PDF document text
    • https://josusijino.weebly.com/uploads/1/3/0/7/130739082/nododapomimi.pdfIn PDF document text
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/3368587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5febb3bc1f1d6.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/adf16f41-1091-4f2d-a0cc-da8c50446972/canon_mg2200_inkt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d554fa53-6af3-4192-b089-5908ff611630/jexepojowave.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/oedipus_rex_by_sophocles_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/34740381086.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/android_x86_oreo_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb243c4-1875-48f3-aff2-a67d793e0270/who_is_the_founder_of_psychoanalytic_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1725d1de-4574-4e9c-9075-471c2126c698/gabevilutojetom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95c456d-f786-4a95-879b-f550f9bfa34a/79494446536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74be0d8-0604-4e5c-9491-7f0296a6b759/what_is_the_importance_of_visual_media_in_your_life_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5f32fc-a949-4d25-838b-28fbb5fb4424/60277945446.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/89993078331.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/environment_vocabulary_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6bed0e-721b-4175-a870-88a5a96c3f24/how_to_clean_the_uppababy_mesa_car_seat.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_off000149f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F8 5164 bytes
SHA-256: 64e73c8b2fd1a9e113ce45260c02487202787e823b6fafb873702475326abcf7
font_01_sfnt_off00015b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B7E 11664 bytes
SHA-256: a53e7f9e77de6c6f0619206d1d29c1ef392f57a5a34b4ce02f55017865f828f8