Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a6159a85cd5c28…

MALICIOUS

PDF

67.8 KB Created: 2020-10-27 00:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 340da310cacb5b2b4f2c022c70776b26 SHA-1: ba7420db72f4a7403293ddb5f168f02e89e4b80b SHA-256: e0a6159a85cd5c28c4ddbaaeda901948ef0fc046899c8976e3cf2233a8f23308
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=unofficial+oblivion+patch+game+of+the+year+edition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f91e7b438168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f925b0557ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5f912e0595ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f9425c1cb37d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5f92edf647ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f974c0d665d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5f96f42919915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f9566bca44b4.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://s3.amazonaws.com/jenagubadopi/perelume.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/canvas_o_que.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/spectacular_now_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/kujejivoranuzazi.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/zazipumokafuletudekamawa.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/bozis.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/wamudidedajubosanepebid.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/brand_value_vs_brand_equity.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/alemite_9968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4661/5231/files/translate_documents_from_japanese_to_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9366/8255/files/cartoon_cartoon_summer_resort_play_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0413/6093/files/trolls_google_drive_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4732/8161/files/97511140461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3082/6141/files/circle_time_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/mijokumapebugiwubarikes.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/bitomaketinalexex.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bucor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/descargar_diccionario_en_ingles_y_espaol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28F 5472 bytes
SHA-256: 6968ab7a44340e47d59b0ecb09490af64fc81cec833ee6c04132a2770713ae57
font_01_sfnt_off0000b4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FB 11212 bytes
SHA-256: b8fb35b99772a4aa8322b5d8a1e3c095cc4208e9a2e5fd59acaccaba134f3a0b
font_02_sfnt_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 16208 bytes
SHA-256: 3a7d25cc37f3ad8db9e8a7fc5b2c94d7797cff121feeb8d7d464cc6310a89da1
font_03_sfnt_off0000f074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333