Malicious PDF — malware analysis report

Static analysis result for SHA-256 49dc3362bf54a664…

MALICIOUS

PDF

43.7 KB Created: 2020-10-15 08:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 76896d44a6b8ced1abdf61d6b9e4ca89 SHA-1: e19878eb9bc664a16501e9eb94f211f141fcf477 SHA-256: 49dc3362bf54a664cdf2e669afc9f56d965c9bdbd3d13d8726fef8d2ff5b291f
124 Risk Score

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 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://ggtraff.ru/123?keyword=olx+app+latest+version+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8716d54a1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f87a242ce6c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f874dd14695d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f87b473bca2a.pdfIn PDF document text
    • https://site-1039417.mozfiles.com/files/1039417/xakekiga.pdfIn PDF document text
    • https://site-1039503.mozfiles.com/files/1039503/kiboga.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/8714818097.pdfIn PDF document text
    • https://site-1041851.mozfiles.com/files/1041851/munowidesiluw.pdfIn PDF document text
    • https://site-1039349.mozfiles.com/files/1039349/tofetukolido.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/nifeva.pdfIn PDF document text
    • https://site-1041861.mozfiles.com/files/1041861/47200407836.pdfIn PDF document text
    • https://site-1040341.mozfiles.com/files/1040341/nidapukutofugolubosikamim.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/1/0498/0074/1025/files/rexol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/secret_romance_ep_10_eng_sub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4054/6209/files/93099486209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7206/9525/files/suras_learn_english_grammar_through_tamil_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/24052106795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7abb50-4ef4-413f-b5ac-9bd441799433/jebonir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6442050-ddc7-45d7-9881-6435a5a9389f/74938733507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cc40f3-fca4-4a25-acf6-6735796ef023/71265796653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/790bc1a7-bc5e-47ed-9bf4-c05f26a298d5/putasoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b117a355-8269-4872-9995-a999efcefdde/85237823186.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_off00006bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC6 5264 bytes
SHA-256: 7b1f1533be3ec18d3fcec0635aca433d3f455186469dc9efb84d2e97e370ee5e
font_01_sfnt_off00007dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 10512 bytes
SHA-256: c7a7a8538b067b07aa2b986e204a3f5f5fde91ae73a7414e6921e90fcf65e631