Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc585c36ca6d3f04…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 16:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d3a43ed880bb01e044b6ac5150f0b16a SHA-1: 37e68decb214a0277dde985c368cb29598951d56 SHA-256: dc585c36ca6d3f04fe98e448b50169587632f5ae7226eb8fafd28fa75e10d30f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or redirecting users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://soxebez.ru/wix?keyword=cellular+respiration+and+exercise+haspi+medical+biology+lab+08a+answer+key PDF link annotation
    • http://wanididezaj.getenjoyment.net/47720178431.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/bodumanoraxuxap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fcc9f89dc141.pdfIn PDF document text
    • http://viximer.iblogger.org/miller_bobcat_225g_8000_watt_welder_generator.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/53198137428.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/why_was_the_mortal_instruments_movie_so_bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_601717f057f4f.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/4a21b224-3166-4f76-a270-5e7603b90f69/husqvarna_125bvx_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d75856a-27fb-440e-bc52-6fd645944d1e/88694126280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e69e239-e228-4158-a406-7c0191ed1574/99140991455.pdfIn PDF document text
    • http://kogavajel.epizy.com/bixijogategemofajewolab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62a20c8-b812-4f66-a6da-5c1236ffeadb/18725648558.pdfIn PDF document text
    • http://sujosivetobifir.epizy.com/womofosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201df045-4f41-46aa-b9eb-1278b2b77a76/how_many_quarts_of_oil_does_a_2016_lexus_rx_350_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460ea57c-6685-4bff-b523-97076a8cd8af/how_much_does_the_post_office_charge_for_insurance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3430d048-9065-439e-808d-08bb4ed2cf7d/materia_y_relacion_con_la_energia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c131e3f-a4cb-4a61-8f87-7c6451f76eac/sexasanazikegotesas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d94a606-3e34-4c63-a15f-0ed5a6079269/52811932706.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_off0000de3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3E 6196 bytes
SHA-256: 860396442f78be0811b91f987efb95443adf66bcd07c192ff0e64a689698922a
font_01_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 10484 bytes
SHA-256: cdb35641b5ade8c74db3556943abaecc4cd88e6b84480eee98100fffdd898721

Open this report in the interactive analyzer, or submit your own file for analysis.