Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4acd3884d9151a8…

MALICIOUS

PDF

43.7 KB Created: 2020-10-15 21:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 703b5adbcffb579f2b303f0ce6564193 SHA-1: d5f8878745ee26519248d956cb9068c1a713e679 SHA-256: a4acd3884d9151a860e16f4aaf1d62b31167eab58bb486d306322ce66966e1c0
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/123?keyword=manual+formato+apa+2020+pdf In PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/6095284.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/bijawixevibo-metamosukes-jekulukiz-tesoromiwi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/88889428553.pdfIn PDF document text
    • https://site-1039534.mozfiles.com/files/1039534/gajaxujipalupoxojezese.pdfIn PDF document text
    • https://site-1041091.mozfiles.com/files/1041091/36209795483.pdfIn PDF document text
    • https://site-1038715.mozfiles.com/files/1038715/dusalen.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/zuvekazabuz-topofelo-gupolekodojavo-ponabiloxe.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/gopelobudava.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ratefunerod.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/bopoka-dawemimuz-towadidam.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/681701e1bb51.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/8006597.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/9ba124bc36355.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/8123918.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/vovadigofovexuneze.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/kogog.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/65524789046.pdfIn PDF document text
    • https://site-1039343.mozfiles.com/files/1039343/28031977478.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/ac05440f-ebb0-401b-9ecd-491a7cf59633/jibufewizimapifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbaa840-dfbb-41eb-a23e-b6bbf86cb7bc/jiwix.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_off00006d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 5288 bytes
SHA-256: 0cba6e0ca0d1128ffe1dc4a6221fc1c3c8fee988dd506999287776c9a426d017
font_01_sfnt_off00007f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F46 9872 bytes
SHA-256: 7fe2f134fcb09c0c90f5c77893ab94f85657957164eea92e8876da39ead93d65