Malicious PDF — malware analysis report

Static analysis result for SHA-256 199251bd83fdb7b3…

MALICIOUS

PDF

49.2 KB Created: 2020-10-21 01:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc9f11de7b7d12d7416c351565934084 SHA-1: 817246ba60c1ff1ce0fcd40f5c614f43a1371310 SHA-256: 199251bd83fdb7b3ab89478f7a89cc26ca3dc3a82939e2ec16d99e6de04e78c2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for game ROMs. The presence of many external PDF links suggests a link farm or redirection strategy to obscure the ultimate malicious destination.

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://cctraff.ru/strik?keyword=mario+bross+snes+loveroms In PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/fabf5383a5d6.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/weledusew-finalaneze-vapekiposi.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/cfad1d.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/2135879.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/jopururedapuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3a2aed-ac5b-4f6a-9685-653fb53f97e3/5392300746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f337a370-8f15-4661-b7c4-2882de6fc08c/kixezipobemirajedupebej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff46ec81-1195-48ea-90b7-a1c4778572f0/vesatekababokofapiferob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682ae211-9647-454b-8193-0eb5a3c6922d/oregon_dmv_driver_s_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a754468-b14e-42b8-88e4-92cf5dfe89a1/84365846856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3774688c-4030-458c-9711-c9ca3f2377bb/fabimojoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc8d296-fcc3-4400-ba1d-9d21003ea38b/jikegapidokeravesola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14a79fc-161c-4d04-9ae7-51ed6d2adf5d/85495388486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6200/8214/files/download_kodi_16.1_jarvis_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2434/1928/files/cec_2020_graduation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9126/1595/files/21740484498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6835/0886/files/instructional_materials_in_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6073/2319/files/physiology_viva_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/27986659297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/what_is_code_in_curriculum_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/vorifavib.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_off00008358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8358 5036 bytes
SHA-256: dc1271e58bfa50accdbbc99aefd8dc6d8775cf9275cf985d4e0fd7f15f0d0f81
font_01_sfnt_off0000946b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x946B 10192 bytes
SHA-256: 619e08367f69b050b64de7c589bd1be3116ee5ef270a71c1feeeeae219090686

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