Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9784ffda2f603c…

MALICIOUS

PDF

81.5 KB Created: 2021-03-16 02:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e11633b3c0db92b1a1239722d73800c9 SHA-1: e6095efa42e1b5491012a7f82e38311c8dba4a48 SHA-256: 0e9784ffda2f603cad1cdf733f14f3ed7ace6f402854e2956e3c9772dd9193c6
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains keywords related to "Hydrochlorothiazide dosage forms and strengths", suggesting a lure to disguise malicious links. The presence of embedded JavaScript and the ML classifier's high confidence further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=hydrochlorothiazide+dosage+forms+and+strengths PDF link annotation
    • http://wedurorokim.mypressonline.com/fuxotubatemasasel.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/15409013384.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/samsung_rf26hfendsr_water_filter_location.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/misesuw.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/lagijajabeguji.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/nukemeronoweku.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/gojano.pdfIn PDF document text
    • https://rebigakudaj.weebly.com/uploads/1/3/1/3/131383708/vogudi.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/578965aba.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://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_8bc2b5b188434d2e9f206f5ea1c7063e.pdf?index=trueIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_6615fe65205d4e9eb07726aae1312145.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/fepumalubujuwa.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_c5b1f9f731b141dcb6ca8c93c0d5e57e.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_7da15cef233b4c7ab56cc571b752690c.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_cef3e1ecf2f94f89a3d8a684645ca8ed.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_4188cd6100644e9b91d2c644e67accc6.pdf?index=trueIn PDF document text
    • http://negumigimewote.onlinewebshop.net/free_automotive_repair_manuals.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/building_construction_costs_book.pdfIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_8e87eca003b741feb4d56ceb06864653.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/goat_simulator_ritual_achievement.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/ragiduzogiteteralu.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_ae702cbcbd6c4949bd813c9dfa0af2ca.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_fbedb4a456954142a90a41d3078e0799.pdf?index=trueIn 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_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 5336 bytes
SHA-256: 3c6d7a790ab7e6a332314cd32e03a50fd05aa3cef90d16015d29e984335e13d9
font_01_sfnt_off0001045f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 10892 bytes
SHA-256: 077168718f586e31dcf51526bedb842426fc0090c15f2d942c04d6ff254c6fc8
font_02_sfnt_off000129b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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