Malicious PDF — malware analysis report

Static analysis result for SHA-256 2009ad3b8a0724df…

MALICIOUS

PDF

86.1 KB Created: 2021-02-08 14:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6d23332e88cb1d19182eb1c2b11261d2 SHA-1: da9f1a02492a2911a999b401c1026ab4ef243c27 SHA-256: 2009ad3b8a0724df7c2b62a175d47e44ffcf91c4c41eedea739886e3ffed1fa7
212 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document also functions as a link farm, hosting numerous links on disposable domains, suggesting an attempt to obscure the final malicious destination. The ML classifier strongly indicated maliciousness, and ClamAV detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wb?keyword=uc%20browser%20malayalam%20movies%20free In PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/pujaxi-digipu-baxuli.pdfIn PDF document text
    • http://detonic-ro.website/2093394171959zqt.pdfIn PDF document text
    • http://gelivebun.22web.org/definition_of_accounting_information_system.pdfIn PDF document text
    • http://jifoxife.66ghz.com/ruvarawimigilafuwepizunu.pdfIn PDF document text
    • https://dadurafiwazozu.weebly.com/uploads/1/3/4/7/134768329/gafixejokozaxe.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/5456272.pdfIn PDF document text
    • http://fruitnaturs.space/gavemewumadogiganqk2.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/btec_level_3_engineering_unit_6_answers13po9.pdfIn PDF document text
    • http://autokenn.com/adjektivdeklination_testzrpmm.pdfIn PDF document text
    • http://pinerapidsrr.com/bimirijizivosad5sz1g.pdfIn PDF document text
    • http://zhigina.ru/junebijufuwemcwdet.pdfIn PDF document text
    • http://lexidubug.22web.org/marketing_agency_brief_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobexot.epizy.com/bing_weather_app.pdfIn PDF document text
    • http://legibevisavu.epizy.com/missy_elliott_alyson_stoner_vma_performance_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/wavelength_period_and_frequency_worksheet.pdfIn PDF document text
    • http://fuxezenoligasas.rf.gd/88221115398.pdfIn PDF document text
    • http://koxogulu.rf.gd/adding_mixed_fractions_with_same_denominator_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/77495823709.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/taunton_prep_school_uniform_list.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_off0000fc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 5412 bytes
SHA-256: 7b8365602944f83d36c2d8a2aee17cc643c07aa32b7aba281b8187231122ce59
font_01_sfnt_off00010ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF3 11172 bytes
SHA-256: 5c488bd6bc3d667b41247f976a547b6540b1baee5c8b2537056cd18b7965e3d9
font_02_sfnt_off00013543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13543 16296 bytes
SHA-256: 6a9a6750a1f020900cf06996199e53204e7cc94092ec82a47bebb9eef8d1c96c