Malicious PDF — malware analysis report

Static analysis result for SHA-256 e481351c0dc6efad…

MALICIOUS

PDF

51.0 KB Created: 2020-10-25 19:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3f0539ea7585b19aaff13ece3ffcf94d SHA-1: 7ca512ec4ea1fc3d594edc0065aec8ec8908caf8 SHA-256: e481351c0dc6efadd5f3b535fca0c0fd5b23468a1d412aedd238ab51df83e538
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, masquerading as a 'Cambodia visa on arrival form pdf', which are designed to redirect users to malicious infrastructure. The primary redirector URL identified is https://ggtraff.ru/aws?keyword=cambodia+visa+on+arrival+form+pdf. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or phish for information.

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/aws?keyword=cambodia+visa+on+arrival+form+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8f68afa70c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8946b1f3618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_5f90d53d009ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f8f423a1613c.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/zaluv.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/9333405.pdfIn PDF document text
    • https://rusezoxebob.weebly.com/uploads/1/3/4/3/134355184/xopojuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f8c9355f385d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5f94bf51555f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f952cf7e12a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f8e1a7c11b29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f8eea3c395c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f94fb74e0641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5f909e5c3ea14.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/4315132.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/pasanozepakurifol.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://cdn.shopify.com/s/files/1/0481/5119/9895/files/lowes_power_inverter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/24015721018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2463/6823/files/purituladowelixolilodije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1049/0022/files/26341683781.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_off00007b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 5000 bytes
SHA-256: 23866e8b9504aebeecab6069a97bfdddc0d464598af9c1d27eaa2d2dde610300
font_01_sfnt_off00008bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF9 10516 bytes
SHA-256: 0dfc4f02307c24239c155a71dedd1af438de431dca533e0ce1301c13e2776d34
font_02_sfnt_off0000b01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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