Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7353fb906bb6ad1…

MALICIOUS

PDF

45.4 KB Created: 2020-10-15 19:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e4cd3f2d9b99ea0d57f26a273ab7da6 SHA-1: a9e1505d6fc1fa9cd344ff86ab1faf42c19b77b2 SHA-256: b7353fb906bb6ad153f6cdce7b749e53f17c280916e3606a5073f6552f76fc85
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lead the user to malicious infrastructure. The document body, though heavily obfuscated, includes text related to 'agricultural water management techniques pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many pointing to Shopify and Strikingly domains, further supports the link farm heuristic, likely used to obscure the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=agricultural+water+management+techniques+pdf In PDF document text
    • https://site-1038670.mozfiles.com/files/1038670/zetenugeb.pdfIn PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/69453060420.pdfIn PDF document text
    • https://site-1044104.mozfiles.com/files/1044104/mutitegirejupofamon.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/5079910.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/476d4813f.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/1/0432/5644/7136/files/87918648956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9207/3376/files/esclerose_multipla_no_brasil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4904/0072/files/insect_pest_of_rice_crop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0217/0008/files/wuweguleze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33157681-2b24-4dd3-92dc-b2b3deaf31ac/gotutitawapexomufix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb9176e-0040-4b11-ae8a-51d973f1eca0/56329304751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3096194-fa6c-48fc-9f36-a0f39a4056bb/kutozokifabedumofisesugop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9394297e-8d3f-4d20-bdf2-7004714b0734/xorimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963d6255-07ae-4c78-a8b9-6b4c16dc8286/tamanafezurabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3820/4053/files/14732923300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5028/2393/files/majasagujabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/5991743540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1392/2201/files/sasixanafovipuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f36405-b35e-47ad-8d14-d1992d1e192a/58623455134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ffeb4a3-0339-4e9e-a192-399588f92fa7/53116033131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1355ac2f-1580-4dd2-b8bc-f0e45852a468/waloriludadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c35efa-e2db-4699-a15e-945f0acf5853/40964524742.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_off000070c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C4 5776 bytes
SHA-256: c1b3199ad6617e8aba3df149355052ec40d11ffa5dd33989c6c62d7253ad4721
font_01_sfnt_off0000844b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844B 10272 bytes
SHA-256: b04115e3625903b7fd807fec39fe0db51284dcf9c11e12f2608aaa45f56b9d50