Malicious PDF — malware analysis report

Static analysis result for SHA-256 765533c166ed856c…

MALICIOUS

PDF

82.7 KB Created: 2021-03-10 14:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8458a8c11fd34d49c622fa735358c931 SHA-1: d656f5efe933df59545f5b0e602f062c7b708f94 SHA-256: 765533c166ed856c67a827988e53019a91bb7d0596ac6a26e94c7ff66e8e89ae
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating it functions as a link farm. The primary URL, https://lozipotod.ru/award?keyword=advanced+oxidation+process+wastewater+treatment+pdf, suggests a potential SEO manipulation or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to driving traffic or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=advanced+oxidation+process+wastewater+treatment+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497638/normal_5feaf69c334c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fe51c5241a7c.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/53695516863.pdfIn PDF document text
    • http://vosalax.22web.org/24708902864.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/is_sat_cancelled_tomorrow.pdfIn PDF document text
    • http://sudoniwitexife.22web.org/foxijexaxit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417426/normal_6007a00db3502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_60337daf1df07.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/e78f73e8-06b0-414e-87c3-6ba993146f45/nesiwas.pdfIn PDF document text
    • http://vukelas.rf.gd/fizitinas.pdfIn PDF document text
    • http://govogudumig.epizy.com/relomikazimebitaw.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_f1329eefd131445a9ec384b117f21c46.pdf?index=trueIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_f97ed40253ac4c9089ff2e95c449912f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dc089f-eeee-4df8-bd37-d7bbf6f9ae62/7851081210.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/vekezivitetufetojiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61d0221-83cc-4fc0-885f-63516dd16358/how_to_install_stacking_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84284f0f-ae46-447c-a0d5-055e821745aa/how_to_install_a_dometic_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46208a6a-8414-450a-87be-552add6cd7ed/where_to_get_the_book_of_enoch.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 5476 bytes
SHA-256: 350eb4871ea5e190425c59360950e48844bdbe0f86ac5535f5698c250c4858e2
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 10392 bytes
SHA-256: 7059c7ef9b5c985cb7887573ba7861d9563a76f93070a7e40b403e21cd2de0c0
font_02_sfnt_off000127c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C7 16100 bytes
SHA-256: dfdc6983d3c42b81f9741fa6cdceaab3e97c1fbda00e6274acf933e6ff911e94