Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9af0cbfd2dea4f5…

MALICIOUS

PDF

79.5 KB Created: 2021-03-31 12:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad1b009b482797b1026776c8fad083b1 SHA-1: 2074acb7a2c9d3e8aa053148e5b17600d65976da SHA-256: f9af0cbfd2dea4f53ae4cf07cbcf1b211b9a4ac68e764f3b89ac68afee0e8f6e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm, suggesting a phishing or scam campaign. The presence of the URL 'https://xajibur.ru/wix?keyword=payday+loans+not+brokers' indicates a potential lure related to financial services. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving redirection to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/wix?keyword=payday+loans+not+brokers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5fe966da2f904.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/english_for_academic_study_reading_and_writing.pdfIn PDF document text
    • http://oneplusonemain.xyz/86863648861jfwje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_6020967a89b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_6041fcc49971f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5fd2238676084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_60518676d100e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_600be7b5299c1.pdfIn PDF document text
    • https://devejibotabakap.weebly.com/uploads/1/3/4/7/134702496/2667377.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_60095fbf41c84.pdfIn PDF document text
    • https://ganalazukomej.weebly.com/uploads/1/3/4/7/134714395/64a01d9.pdfIn PDF document text
    • http://usecabinets.xyz/33477165106j6u8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_6027ca3caf8bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421943/normal_5ff259f92f329.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/30645693315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_6035efc0386c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464720/normal_603618ff5c5a3.pdfIn PDF document text
    • http://badge-verification-center.com/kirotatetosebwtlj.pdfIn PDF document text
    • http://businessoutsourcing.org/lego_city_undercover_vehicle_guide256sw.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/pomivuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489407/normal_5ffe727d140ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_600afec02a256.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/monagedakiz_somomojugeb_rakudov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_600d353f2e265.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://milebulijulami.onlinewebshop.net/nubis.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/pdf_to_word_converter_nitro_free_download.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_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 5128 bytes
SHA-256: 99590fea87da6974af74fe136f0eda1e9ed29fb9bbcf751ff5ac2aa0c33b091c
font_01_sfnt_off00010bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDA 10636 bytes
SHA-256: e766512960bc5ac2835609b1e96b2e5b2310bed9d7e04e75729edee9155e91ab