Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bdec3a6887bfae…

MALICIOUS

PDF

47.7 KB Created: 2020-10-25 09:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c4e69082f6d391ae90712fd161aa0771 SHA-1: 0b14018d66fea85e5b475b76c54cc548d1786aa3 SHA-256: 19bdec3a6887bfaecd46bdeb3ac9173565deccb34031e39c36ec670e0c656808
184 Risk Score

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://cctraff.ru/aws?keyword=characteristics+of+hypothesis+in+research+pdf In PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/5827209.pdfIn PDF document text
    • https://momezinitakik.weebly.com/uploads/1/3/4/3/134322843/6150436.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/7544631.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/5114437.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/bef2c9f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f8aa4e0655f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8730ffa488e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f89ac0075e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f91f8afa472f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007ca3.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007ca3.bin)
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/3526102090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8012/5082/files/tojafuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/mofewaromatamirubive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c17453c-e8e8-416b-903e-751128d9ceb6/7682986124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d570a2b4-f336-483e-b0fe-eb8fec510745/liruwenakomijegafuluso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7dc380-4815-432f-9eb8-ce6918538e1d/37105314259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7594a9-92d8-417e-b607-05cc6bd179d8/13788489933.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/adobe_acrobat_to_word_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/fawepusupikibenad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4f14ac-f2e3-43b0-9d7a-47ce15a32963/rurukefipiwobazitodenawep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cd6e73-dd22-4398-a83d-588cd9ddcb66/demumerurediraminu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3bbc5b2-b0c1-48bc-b888-0ab3ed3862d0/metodiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbe08bf-1d73-4aca-b328-d554be483eff/15729312176.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 extracted file (font_00_sfnt_off00007ca3.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA3 5220 bytes
SHA-256: 25adc9fc69f7c465d08f05e98493546c3d9d828a7fc4daa00f2ae2cc592a6950
font_01_sfnt_off00008e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5F 10200 bytes
SHA-256: 0aa59cf25a6d0c33ba9d72ef6027c254fcfd21f5beb2664ab5b4b629488ca44b