Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b563338f0795335…

MALICIOUS

PDF

48.3 KB Created: 2020-10-15 17:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cc393effc9fb5ee161ba71f2381797c6 SHA-1: 7d61ecbcddad1a7c7df7fb398169e21dbf38ad3d SHA-256: 6b563338f07953357cafda237c237f93fa9983f33243fa00e32706e9ad6c000f
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://ggtraff.ru/pify?keyword=medial+longitudinal+fasciculus+pdf In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/5710959.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/kasawo-rakereroboxit-wuzunirib-midagawatebogef.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/6596298.pdfIn PDF document text
    • https://site-1043669.mozfiles.com/files/1043669/tawujizi.pdfIn PDF document text
    • https://site-1042725.mozfiles.com/files/1042725/34552454373.pdfIn PDF document text
    • https://site-1042617.mozfiles.com/files/1042617/gewipujediwofib.pdfIn PDF document text
    • https://site-1040386.mozfiles.com/files/1040386/16682358807.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/gudar.pdfIn PDF document text
    • https://site-1039852.mozfiles.com/files/1039852/kazegosadaduparefapot.pdfIn PDF document text
    • https://site-1042284.mozfiles.com/files/1042284/16159103873.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/49522778887.pdfIn PDF document text
    • https://site-1038811.mozfiles.com/files/1038811/lodiwarodaperefamobolaju.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/fosakesawe.pdfIn PDF document text
    • https://site-1038472.mozfiles.com/files/1038472/novelitaveribakizexafuw.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/7dafc251cf7.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/dadok.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.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/1/0484/4227/8042/files/waterville_junior_high_honor_roll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1306/9205/files/10-2_practice_measuring_angles_and_arcs_with_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8516/3415/files/9690337979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/zedijej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4947/2159/files/gsm_modem_at_commands.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_off00007202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7202 5112 bytes
SHA-256: 4be4210ba352bc6fa611de12c07fcff9f13f1661a1ee68821943c6e7d576e068
font_01_sfnt_off00008383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8383 10052 bytes
SHA-256: efe0922c945d9dde0f0abe66d7e7b9d29248ca74fc644a91f2fbd023ca13cba7
font_02_sfnt_off0000a5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34